Since we are looking for the length we invert the formula for the area of a rectangle. Length of Diagonal of Rectangle Formula. Since the area of a rectangle is a product of its length and width we need to find the width.
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K-12 students may refer the below formulas of rectangle to know what are all the input parameters are being used to find the area perimeter diagonal length or side of a rectangle. The area of a rectangle A is related to the length L and width W of its sides by the following relationship. What is Area Perimeter of Rectangle. Area Length Width.