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use Pythagorean theorem (A2 + B2 = C2).A is a side touching the right angle, B is the other side and C is the hypotenuse.

example: A = 3, B = 4, C = ?, A2 + B2 = C2, 32 + 42 = c2, 9 + 16 = c2, 25 = c2

5 = c

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Q: How do you find the hypotenuse of a triangle?
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You can't as there is no hypotenuse in an equilateral triangle. The hypotenuse is the side of a triangle which is opposite a right angle (90°); all angles in an equilateral triangle are 60°.


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