# geometry

triangle GHE
GH=10
HE = 17
hypotenuse GE =21
HF is an altitude

Find HF

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1. 10, 17, 21 IS NOT a Right triangle, no hypotenuse here

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posted by Damon
2. In general

h = 2*area/base
here the base is EG = 21

the area is
sqrt[ s(s-a)(s-b)(s-c) ]
where s = (a+b+c)/2

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posted by Damon

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