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The Pythagorean theorem.

a2 + b2 = c2

a and b are you legs and c is the hypotenuse

72 + 152 = c2

take square root each side

sqrt(72 + 152) = c

sqrt(49 = 225) = c

sqrt(274) = c

16.6 = hypotenuse

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Q: How can you find a missing hypotenuse if the legs of a right triangle is 7 and 15?
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