Math. fast please!

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The length of a rectangle is 3 cm and the width is 2 cm. find the length of the diagonal.

Is there a formula to do this?

The length of a rectangle is 3 cm and the width is 2 cm. find the length of the diagonal.

Is there a formula to do this?

The diagonal D and each pair of length L and width W form right triangles which satisfy the Pythagorean Theorem W^2 + L^2 = D^2

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