# Math: Pre-Calc

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A right triangle has hypotenuse 5 inches long. Its area is 4 square inches. How long are the other sides?

• Math: Pre-Calc -

1/2 bh=4
bh=8

b^2+h^2=25
h^2/64 +h^2=25
65h^2=25*64
h= 5*8/sqrt65

• Math: Pre-Calc -

I don't quite follow the last three lines. Could you please explain?

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