Drag a dimension shape to the shape you want to measure, and glue the ends of the dimension shape to the points you want to measure. (Derivative Approach) 0. Online calculator to calculate the dimensions (length and width) of a rectangle given the area A and perimeter P of the rectangle. Check out our length converter or area converter to find out how to switch between different units (SI and imperial). Perimeter = 2 (12 cm + 5 cm) = 2 17 cm = 34 cm Diagonals of a Rectangle Edit the file on your computer and upload it to the server via FTP. If you use the shape tools (ellipse, rectangle, etc.) If a rectangle is 12 feet long and 6 feet wide, its area is 72 square feet. In this example the file must be in public_html/example/Example/. WebHow to find the dimensions of a rectangle given the area? Were committed to providing the world with free how-to resources, and even $1 helps us in our mission. How to find the diagonal of a rectangle in that situation? WebPerimeter of a rectangle. Each rectangular shape is characterized by two dimensions, its length, and width. 1. Before we can find the dimensions of the rectangle, we need find w first. Report an Error Example Question #5 : How To Find The Length Of The Side Of A Rectangle Method 3. We have marked five basic quantities that describe a specific rectangle. Plug the perimeter and the length into the formula and solve for the width. Medium. You should provide the area and perimeter. L = length, Multiply the width and length of the rectangle. WebThe formula for the area of a rectangle is width x height, as seen in the figure below: All you need are two measurements and you can calculate its perimeter by hand, or by using our perimeter of a rectangle calculator above. Solve the above equation for L and find W using W = P / 2 - L. View solution > Show that the rectangle of maximum area that can be inscribed in a circle is a square. You can also use it in reverse for example, to calculate the width of a rectangle with a known length and perimeter. The image above shows a typical rectangle. Its area is 63 square meters. To get this answer, apply the formula diagonal = (P - 8 A). The longer side of the rectangle is known as the length and the shorter side is known as the width. If l = 8 and w = 4, then we have 2(8) + 2(4) which simplifies to 16 +8 = 24 Notice that 8 and 4 sum up to 12. Then, multiply the result by the width to get the area. WebFind the dimensions of a rectangle Math Expression. It has two dimensions length and width. This varies by browser, if you do not see a box on your page with a red X try right clicking on the page, then select View Page Info, and goto the Media Tab. On platforms that enforce case-sensitivity example and Example are not the same locations. Polygon diagonals of a rectangle: p = q = (a 2 + b 2) Rectangle Calculations. How do I calculate the length of a rectangle? In the case of a square, the area will become side 2. WebFind the dimensions of a rectangle with perimeter 100 m whose area is as large as possible. When you drag a rectangular table from the Office Furniture stencil, you see that the dimensions are 3 feet, 6 inches by 6 feet. Suppose, length of rectangle is 5cm and width is 4 cm, then the area will be: Area = 5cm x 4cm = 20 sq.cm. Three figures are connected directly to the shape: a square, a parallelogram, and an isosceles trapezoid. Add the following snippet of code to the top of your .htaccess file: # BEGIN WordPress Learn how to calculate the terminating decimals and the repeating decimals from any fraction, and more importantly, learn when to stop! WebTo find the width, multiply the length that you have been given by 2, and subtract the result from the perimeter. Check out the rest of our rectangle-related tools: To find the length (L) of a rectangle given area (A) and width (W), you need to: To sum up: to find the length of a rectangle, you need to divide its area by the known width. Remember, squaring a number means to multiply the number by itself. How do I find the area of a rectangle if width and perimeter are given? Use it to try out great new products and services nationwide without paying full pricewine, food delivery, clothing and more. 2. This is shown below: 2) Solve the Quadratic Equation. Perimeter of a rectangle: P = 2a + 2b. Rectangle tablecloths given the size of your table, you can find out what tablecloth is needed or how much lace or hemming tape you need to use. View solution > The maximum area of the rectangle that can be inscribed in a circle of radius r is. 3. How do I calculate the length of a rectangle? For example, if the width of a rectangle is 3 cm, and the length is 4 cm, your formula will look like this: 3 2 + 4 2 = c 2 {\displaystyle 3^ {2}+4^ {2}=c^ {2}} . To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Find the area, in square metres, of a rectangle whose length = 4.5 m and breadth = 1.6 m. Solution . In the case of a square, the area will become side 2. A = area, Multiply the width and length of the rectangle. If you have the area A and width w, its length w is determined as h = A/w. P - 2 L = 2 W The rectangle formulas are: Area = L x B Perimeter = 2 (L+B) Diagonal = (L 2 +B 2) Test your knowledge on Rectangle Then, the length will be 6 +4 = 10cm long. Write the length and width next to each other. You can see that to find dimensions of a square, you just have to know either area (. The relationship might be given by stating how many times bigger one side is than the other, or how many units more or less it is. Medium. Find out more about this special ratio with our golden ratio calculator. Transform the equation: WebThe table top is 1 foot, 9 inches by 1 foot, 5 inches. Suppose, length of rectangle is 5cm and width is 4 cm, then the area will be: Area = 5cm x 4cm = 20 sq.cm. Method 3. How to Calculate the Area of a Rectangle. As usual, the perimeter is a sum of all sides of a shape: Let's take the same rectangle as an example: The diagonal of a rectangle is a segment that connects two opposite vertices of a rectangle. Make sure both are in the same unit, or convert one of them as necessary. If you do not know the area or the perimeter, or the relationship between the length and the width, you cannot use this method. Calculate A, P, p | Given a, b Given sides lengths a and b calculate area, perimeter and diagonals A = ab; P = 2a + 2b; p = q = (a 2 + b 2) Calculate P, p, b | Given A, a WebThis tool will calculate the area of a rectangle from the dimensions of length and width. WebOnline calculator to calculate the dimensions (length and width) of a rectangle given the area A and perimeter P of the rectangle . Length of Diagonal of Rectangle Formula: The diagonal of a rectangle is determined by the following formula d = a2 + b2 d = a 2 + b 2 If you're interested in the topic, you can have a look at this explanation and discussion of the results. Optimisation problem on area of rectangle. The area equation is given as A = ab. Type the area and perimeter values into the calculator. These two unique sides are the dimensions of a rectangle. Community Expert , Jul 28, 2016. Step 3: Click on " Reset " to clear the fields and enter the new values. WebThe table top is 1 foot, 9 inches by 1 foot, 5 inches. To find this rectangle's area, you need to: Convert feet to inches. Right click on the X and choose Properties. References. That makes it easy to indicate the other dimensionhow wide the rectangle is from side to sideby using the word width.And if the side-to-side measurement is greater than the P = 2 (a + b), For the diagonal of a rectangle: If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. WebFind the dimensions of a rectangle with perimeter 100 m whose area is as large as possible. solve equation (1) for W: Our decimal degrees to degrees minutes seconds converter can help you convert the angle from decimal degrees to degrees with minutes and seconds. The sides of the shape are parallel to the diagonals. Any combinations will yield a perimeter of 24. You divide the volume by the height and the length. The calculator will take care of the conversion of values entered in different units. 'P/2 - L = W` Preview / Show more . Maximum area of a rectangle whose perimeter is $100$. To derive these answers, use the Pythagorean theorem. If you have the perimeter P and width w, its length can be found with h = P/2w. WebOnline calculator to calculate the dimensions (length and width) of a rectangle given the area A and perimeter P of the rectangle . Continue with Recommended Cookies. WebTo find the width, multiply the length that you have been given by 2, and subtract the result from the perimeter. For example, the rectangle body shape is defined as a "boyish" body type your hips, waist, and bust are about the same size. Are you using WordPress? This will reset the permalinks and fix the issue in many cases. Manage Settings For example, if you are trying to find the width of a rectangle that has a diagonal length of 5 centimeters, and a side length of 4 centimeters, your formula will look like this: For example, for a rectangle with a diagonal length of. To find the perimeter, you need to sum up all sides of a rectangle: To find the area of a rectangle, you need to multiply the shorter and longer side: It's 144 square inches! On the other hand, you can inscribe a circle into a rectangle only if it is a square. So, the width is 6cm long. If you have the area A and width w, its length w is determined as h = A/w. Let us understand it using an example. Check your result in our area of a rectangle calculator! WebFind the dimensions of a rectangle Math Expression. Egypt is the leader, but that shouldn't surprise anybody checking the shape of that country on the map. You need two measurements for a rectangle - width and length. What's the diagonal of a rectangle formula? Hard. Table adapted from Mr. Barry's web page, as the image of the world below. Harris-Benedict calculator uses one of the three most popular BMR formulas. Just plug the area and length of the rectangle into the formula and solve for the width. You are able to find the perimeter of the rectangle by adding length and width and multiplying by two because the opposite sides of a rectangle are equal in length. To find the width of a rectangle, use the formula: area = length width. RewriteBase / 3 feet is equal to 36 inches. The area of the rectangle is equal to the product of its length and breadth. The formula for finding the area of a rectangle is given by Area of a rectangle = Length x Breadth. Step 1: Enter the value of the area and perimeter of the rectangle in the respective input boxes. A dialogue box may appear asking you about encoding. Rectangle vs. other shapes. The formula for finding the area of a rectangle is given by Area of a rectangle = Length x Breadth. It's just a few steps! How to use our "Dimensions of a Rectangle Calculator"? If not, correct the error or revert back to the previous version until your site works again. With this test grade calculator, you'll quickly determine the test percentage score and grade. Discover the math behind that neverending queue at the supermarket with our queueing theory calculator. Example . Doors or window glass did a storm or a golf ball break your window pane? We and our partners use cookies to Store and/or access information on a device. Community Expert , Jul 28, 2016. WebConsidering the use of length and diameter mentioned above, the formula for calculating the volume of a tube is shown below: volume = . There are many rectangular objects around us. Then you'll get the information about what your body shape is. We get 2(l +w) = 24 Dividing both sides by 2, we get l + w = 12 The length and the width must sum up to 12. EX: Beulah is dedicated to environmental conservation. Make sure the calculation is done using the same unit - the result will also be in that unit, e.g. 3. 3. Solution: The properties of a rectangle can be used to calculate the area of a rectangle. The calculator will take care of the conversion of values entered in different units. View solution > The maximum area of the rectangle that can be inscribed in a circle of radius r is. The consent submitted will only be used for data processing originating from this website. If you have the perimeter P and width w, its length can be found with h = P/2w. Hence, we have: To continue, we need to remove the bracket and simplify the equation. You could multiply the height and the length with each other first before dividing. All you need to do is to measure your bust, waist, hips, and high hip and type the values into the tool. 4. To find the width of a rectangle with a known perimeter and length: Perimeter (P) = 2 length (L) + 2 width (W) Have a look at the table below and check out the first ten countries, as well as the least rectangular ones. explanation and discussion of the results, Check out 23 similar 2d geometry calculators , Decimal Degrees to Degrees Minutes Seconds Converter. The formulas for the perimeter P and the area A of the rectangle are used to write equations as follows: P = 2 * L + 2 * W. A = L * W. d = P / (2 sin(/2) + 2 cos(/2)); and. Each triangle will have sides of length l and w and a hypotenuse of length d. You can use the hypotenuse formula, e.g., from the Pythagorean theorem calculator, to estimate the diagonal of a rectangle, which can be expressed with the following formula: and now you should know how to find the diagonal of a rectangle explicit formula - just take a square root: Our diagonal of a rectangle calculator allows you to use almost any units you want. Also, remember that the diagonal of a rectangle calculator assumes that the length is longer than the width! EX: Beulah is dedicated to environmental conservation. WebThe formula for the perimeter of a rectangle is (width + height) x 2, as seen in the figure below: This is the equivalent of adding all four sides, since opposite sides are of equal length by definition. Perimeter = 2 (12 cm + 5 cm) = 2 17 cm = 34 cm Diagonals of a Rectangle See Also: Find length width rectangle given perimeter Show details Check out 23 similar 2d geometry calculators , Harris-Benedict Calculator (Total Daily Energy Expenditure), Decimal Degrees to Degrees Minutes Seconds Converter. The properties of a rectangle are such that you can use these methods for finding the width or length. 3. Enter the perimeter P and area A as positive real numbers and press "enter". Finding the maximum perimeter of a rectangle inside of an enclosed region. W = A/L or W = (P/2) - L. To determine the length and width of a rectangle, you need to: Still got questions after that length and width of rectangle given area calculator? This article was co-authored by wikiHow Staff. To find this rectangle's area, you need to: Convert feet to inches. Last Updated: September 14, 2022 Make sure the calculation is done using the same unit - the result will also be in that unit, e.g. There are 10 references cited in this article, which can be found at the bottom of the page. No manual conversion is necessary for length, width and area units, which can all be selected independently. Check your result in our area of a rectangle calculator! WebRectangle. To determine the diagonal of a rectangle, you need to: To derive the diagonal of a rectangle formula used above, divide a rectangle into two congruent right triangles, i.e., triangles with one angle of 90. . If you don't have the area, you can use the rectangle's perimeter instead. WebThe formula for the area of a rectangle is width x height, as seen in the figure below: All you need are two measurements and you can calculate its perimeter by hand, or by using our perimeter of a rectangle calculator above. WebArea of Rectangle Formula: The area of a rectangle is determined by the following formula A = a b A = a b where a a and b b are the length and width of the rectangle, respectively. Hence, we have: To continue, we need to remove the bracket and simplify the equation. W = width. Preview / Show more . It is possible that you may need to edit the .htaccess file at some point, for various reasons.This section covers how to edit the file in cPanel, but not what may need to be changed. If you have the perimeter P and width w, its length can be found with h = P/2w. WebArea = 6 m 3 m = 18 m2 Perimeter of a Rectangle The Perimeter is the distance around the edges. WebThis tool will calculate the area of a rectangle from the dimensions of length and width. The USA is in the middle of the ranking, mainly because of the eccentricity of Alaska and Hawaii. Maximum area of a rectangle whose perimeter is $100$. Before we can find the dimensions of the rectangle, we need find w first. EX: Beulah is dedicated to environmental conservation. Let's solve this equation: [7] A = 4 cm * 5 cm. Its area is 63 square meters. See Also: Find length width rectangle given perimeter Show details And now let's use that in the second equation: Solving the equation above, we will obtain L. Then, to find W, we can use Just plug the area and length of the rectangle into the formula and solve for the width. 4. l. where d1 is the outer diameter, d2 is the inner diameter, and l is the length of the tube. and WebFollow the steps mentioned below to find the length and width of a rectangle. If you use the shape tools (ellipse, rectangle, etc.) 1. If you have the area A and width w, its length w is determined as h = A/w. Either way, please contact your web host immediately. In this example, the length is 5 cm and the width is 4 cm. A = W * L (2) In that case, you would use the formula: perimeter = 2 length plus 2 width. Note: To change measurement units, right-click the dimension shape Finally, take the square root of the result: Draw a line from the midpoint of one side of the square to the opposite corner. 4. l. where d1 is the outer diameter, d2 is the inner diameter, and l is the length of the tube. A = L * (P / 2 - L) Just click. W = V / (H*L). 3 feet is equal to 36 inches. WebThe dimensions of the rectangle which has the maximum area, are. What are the dimensions of the rectangle? WebIn the Shapes window, click More Shapes. Each rectangular shape is characterized by two dimensions, its length, and width. You need two measurements for a rectangle - width and length. The length of a rectangle field is twice its breadth. The easiest way to edit a .htaccess file for most people is through the File Manager in cPanel. So any combination of numbers that add up to 12 will be our dimensions. Write the length and width next to each other. Our decimal degrees to degrees minutes seconds converter can help you convert the angle from decimal degrees to degrees with minutes and seconds. If you don't have the area, you can use the rectangle's perimeter instead. WebCalculate width & length of a rectangle step by step. Decide on the width of the rectangle e.g.. The Five Biggest Sports Clubs In The World, Area, Perimeter and Diagonal of a Rectangle - Geometry Calculator, Use Derivatives to solve problems: Area Optimization. Length and width of rectangle given perimeter calculator, Perimeter of a rectangle with given area calculator. Check out our length converter or area converter to find out how to switch between different units (SI and Your expression for the length is then, For example, if you know that area is 24 square centimeters, and that. Point to Visio Extras, and then click Dimensioning-Architectural or Dimensioning-Engineering. No manual conversion is necessary for length, width and area units, which can all be selected independently. So any combination of numbers that add up to 12 will be our dimensions. d = (2 A / sin()); Given perimeter and angle: In the Hough Transform, we can relate the length of the line from the origin to a point (x, y) in the image subtended at the angle theta by: rho = x*cos (theta) + y*sin (theta) We can also form the equation of the line y = m*x + c in Cartesian form. 4. A rectangle is an example of a quadrilateral. Multiply the length times the width. P = 2 * W + 2 * L (1) The formulas for the perimeter P and the area A of the rectangle are used to write equations as follows: P = 2 * L + 2 * W. A = L * W. WebThe dimensions of the rectangle which has the maximum area, are. WebHere's how: 1) Write an equation that relates 45cm2, w+4 and w. To do so, we know that the area of the rectangle, 45cm 2 can be found by multiplying w with w+4. Before you do anything, it is suggested that you backup your website so that you can revert back to a previous version if something goes wrong. To find the width of a rectangle, use the formula: area = length width. The area of a rectangle is a space restricted by its sides or, in other words, within the perimeter of a rectangle. Your length is 5 cm and your width is 4 cm, so you should plug them into the equation A = L * W to find the area. http://www.coolmath.com/reference/rectangles#The_area_of_a_rectangle, http://www.mathopenref.com/rectanglearea.html, https://www.cuemath.com/measurement/area-of-rectangle/, http://www.virtualnerd.com/middle-math/geometry-measurement/rectangle-perimeter-area/rectangle-perimeter-example, http://www.mathopenref.com/rectangleperimeter.html, https://www.varsitytutors.com/basic_geometry-help/how-to-find-the-perimeter-of-a-rectangle, http://www.coolmath.com/reference/rectangles#The_diagonal_of_a_rectangle, http://www.mathopenref.com/rectanglediagonals.html, https://www.varsitytutors.com/basic_geometry-help/how-to-find-the-length-of-the-diagonal-of-a-rectangle, https://sciencing.com/length-width-rectangle-given-area-8472576.html, (Find the Width of a Rectangle). L 2 - L (P / 2) + A = 0 Follow the steps below to find the area: RewriteRule . Did you know that there is a special rectangle called the golden rectangle? We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. When you get a 404 error be sure to check the URL that you are attempting to use in your browser.This tells the server what resource it should attempt to request. Now insert the above equation into the equation for the area (A): The area equation is given as A = ab. Multiply the length times the width. In the Hough Transform, we can relate the length of the line from the origin to a point (x, y) in the image subtended at the angle theta by: rho = x*cos (theta) + y*sin (theta) We can also form the equation of the line y = m*x + c in Cartesian form. Let's start with our rectangle. To find the dimensions of a square with side length a: To find the dimensions of a square with a given area, you just have to take the square root of A. WebCalculate a Rectangle Area Calculator Use. If you're wondering how to find dimensions of a rectangle given area and perimeter, do not fret our dimensions of a rectangle calculator helps you find the dimensions of a rectangle right away. First, let's write down three basic equations for the area, perimeter] and circumcircle radius: With the above equations, we can now derive various diagonal of a rectangle formulas that are used by this diagonal of a rectangle calculator: Given length/width and area: Both lengths of the rectangle are the same, and both widths are the same. WebArea of rectangle is equal to the product of its length and width. What is the rectangle formula? WebTrying to find the dimensions of a rectangle that would result in the max area. WebFollow the steps mentioned below to find the length and width of a rectangle. This name derives from the fact that a rectangle is a quadrilateral with four right angles (4 90 = 360). This number divided by 2 is the width. Whether you need to know the area of a carpet, a parcel, a TV screen, a rectangle pool, or a window, this area of a rectangle calculator will solve your problem in a blink of an eye! 4. Perimeter of a rectangle: P = 2a + 2b. It may be used for walls of bricks, floor tiles, pavement, or different mosaics. Width Given Area Width Given Perimeter Length Given Area Length Given Perimeter. This article has been viewed 590,222 times. How do I find the length and breadth? Know the perimeter of the rectangle. If you don't have the area, you can use the rectangle's perimeter instead. Any combinations will yield a perimeter of 24. The answer is 1.176 times the longer side. For example, you might know that the length is five centimeters longer than the width. If you're struggling to find all those unknowns surrounding rectangles, you're in the right place. To determine the length and width of a rectangle, you need to: Know the area of the rectangle. The confusing thing is that the 2nd most rectangular country Vatican is at the same time the 4th-roundest country, and Poland, 5th in roundness classification, is 9th in the rectangularity ranking. Drag a dimension shape to the shape you want to measure, and glue the ends of the dimension shape to the points you want to measure. Have you met a specific rectangle problem and you don't know how to find the diagonal of a rectangle? Example 2: Calculate the area of a rectangle whose length and width are 14 cm and 10 cm, respectively. A rectangle is a quadrilateral in which all the angles are equal and the opposite sides are equal and parallel. If you don't have the area, you can use the rectangle's perimeter instead. Now insert the above equation into the equation for the area (A): Hurray! Test your website to make sure your changes were successfully saved. For example, you might know that the area of a rectangle is 24 square centimeters, so you would set up the formula for area of a rectangle. If you know the rectangle's area and perimeter, you can recover the diagonal using the formula: where P is the perimeter and A is the area of your rectangle. # End WordPress. Step 1: Enter the value of the area and perimeter of the rectangle in the respective input boxes. The answer is: width of this rectangle is three inches. The main difference between square and rectangle is that the length and breadth are equal for square. Please pick an option first. Its definition is that it has all four sides of equal length; alternatively, the angle between two diagonals is right. So, the width is 6cm long. It also has unequal adjacent sides, in contrast to a square, a special case of a rectangle. It has four sides that create four angles. Now you know how to find the dimensions of a rectangle given area and perimeter. A rectangle is a quadrilateral in which all the angles are equal and the opposite sides are equal and parallel. A rectangle is a 2-dimensional geometrical shape formed by four perpendicular sides. Step #3 - Find points of intersection. Enjoy! We may also define it in another way: a parallelogram containing a right angle if one angle is right, the others must be the same. Have a look at the picture below, and you shouldn't have any doubts about the relations between quadrilaterals anymore: How to read this diagram? WebHeight: When a rectangle is drawn with horizontal and vertical sides, the word height makes it clear which dimension is meant; height labels how high (how tall) the rectangle is. We get 2(l +w) = 24 Dividing both sides by 2, we get l + w = 12 The length and the width must sum up to 12. If you go to your temporary url (http://ip/~username/) and get this error, there maybe a problem with the rule set stored in an .htaccess file. 0. WebSolving problems modeled by quadratic equations.The length of a rectangle is 12 meters less than three times its width. Sometimes you won't have given the length of two adjacent sides of a rectangle. W = 3 in Instead of using the resizing handles on the table shape to make it smaller, use the Size & Position window to set the exact size. Level up your tech skills and stay ahead of the curve. You now have the total length for the remaining 2 sides. Both lengths of the rectangle are the same, and both widths are the same. d 12 - d 22. Optimisation problem on area of rectangle. WebThe formula for the perimeter of a rectangle is (width + height) x 2, as seen in the figure below: This is the equivalent of adding all four sides, since opposite sides are of equal length by definition. % of people told us that this article helped them. d 12 - d 22. How do I calculate the length of a rectangle? Calculate A, P, p | Given a, b Given sides lengths a and b calculate area, perimeter and diagonals A = ab; P = 2a + 2b; p = q = (a 2 + b 2) Calculate P, p, b | Given A, a The formula for the perimeter of a rectangle is (width + height) x 2, as seen in the figure below:. Then divide that number by two, which gives you the length of the rectangle. The center of a rectangle is equidistant from its vertices; therefore, you can always circumscribe a circle on it. When you drag a rectangular table from the Office Furniture stencil, you see that the dimensions are 3 feet, 6 inches by 6 feet. d = w / sin(/2) or d = l / cos(/2); Given area and perimeter: so that your final formula is: To determine length and width of rectangle given area and perimeter: To find the width of rectangle given perimeter (16 in) and length (5 in): P(perimeter) = 2 L (length) + 2 W (width) Find the area, in square metres, of a rectangle whose length = 4.5 m and breadth = 1.6 m. Solution . Write an equation in B, stating that the perimeter is equal to twice the breadth plus twice the length. Solution: The properties of a rectangle can be used to calculate the area of a rectangle. Just Now Web Now, let the width be w. Since, the length is 4cm greater than the width, the length will be w+4 cm. d = l + w, and now you should know how to find the diagonal of a rectangle explicit formula - just take a square root: d = (l + w). The rectangle formulas are: Area = L x B Perimeter = 2 (L+B) Diagonal = (L 2 +B 2) Test your knowledge on Rectangle