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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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