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Learn the equation for finding the area of a rectangle. The equation for finding the area of a rectangle is simply A = L * W. This means that the area is equal to the length of the rectangle times its width.How do you calculate the area of a rectangle?
To calculate the area of a rectangle, multiply the length of the rectangle by its width. You need to know the length and width of the rectangle. A ruler, a pen, a paper and a divider are helpful in completing this task.How to find the dimensions for a rectangle?
Method 1 of 3: Using the Length and the Width Set up the formula for the Pythagorean Theorem. You use the Pythagorean Theorem because a diagonal of a rectangle cuts the rectangle into two congruent right triangles. Plug the length and the width into the formula. These should be given, or you should be able to measure them. Square the length and width, then add these numbers together. ... More items...