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a2 + b2 = c2

a2 = c2 - b2

a = sqrt(c2 - b2)

==================no +/- square root as a negative length makes no sense in a right triangle

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Q: How do you find A in the pythagorean theorem?
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How do you use a Pythagorean theorem with cube?

You can use pythagorean theorem twice to find the diagonal of a cube

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The Pythagorean theorem is a2 + b2 = c2. It is used for right triangles. If you know two of the sides, you can use the theorem to find the third side.

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