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Rectangle Area Calculator
A rectangle's area, perimeter and diagonal from its length and width.
Result…
How it's calculated
Area = length × width Perimeter = 2 × (length + width) Diagonal = √(length² + width²)
Gives a rectangle's area, the distance round it and the length of its diagonal. Checking that both diagonals of a frame or slab are equal is the builder's way to make sure its corners are square.
Your numbers, step by step
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