![]() The diagonal can be calculated using the Pythagorean theorem. To get the perimeter the sum of a and b is multiplied by 2 (because the opposite sides are identical). ![]() Use this calculator to easily calculate the area of a rectangle given its sides (length. The area of a rectangle can easily be calculated by multiplying the length of side a and b. rectangle length width calculatorArea of a Rectangle Calculator. In these situations the tool will just show one of the two possible solutions. For example, a rectangle with perimeter 10 and area 6 has the sides 2 and 3, but it is unclear if it is a that is 2 and b that is 3 or if it's the other way around. If neither of them are specified there can often be multiple solutions. The tool therefore uses the more neutral naming, a and b. When calculating a rectangle's diagonal, perimeter and area it does not matter which side is the base and which side is the height. There are conditions under which this problem has a. The outputs are the width, length and diagonal of the rectangle. Enter the perimeter P and area A as positive real numbers and press 'enter'. The perimeter is 2 a + 2 b, so in this example the perimeter. Then these equations are solved for L and W which are the length and width of the rectangle. Using the same dimensions, we can calculate the perimeter. The distance between the vertical sides are often called the base, while the distance between the horizontal sides are called the height. Example of calculating the area of a rectangle: Suppose the length is a 6 inches and the width is b 4 inches. ![]() Rectangles are often depicted with the longest sides horizontally and the shorter sides vertically. The word rectangle comes from the Latin word rectangulus, a combination of rectus (right) and angulus (angle), which refers to the rectangle's four right angles (90°). If all the sides of a rectangle have the same length it's usually called a square instead. A rectangle is a geometric shape with four sides where all angles are 90°.
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