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10 August, 20:47

What are the lengths of the base and height of the pennant?

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  1. 10 August, 20:49
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    The base of the pennant is 12 feet shorter than the height ... A = (1/2) * b * h

    80 = (1/2) * (h - 12) * h

    160 = h^2 - 12h

    12/2 = 6

    6^2 = 36

    h^2 - 12h + 36 = 160 + 36

    (h - 6) ^2 = 196

    h - 6 = 14

    h = 20

    b = 8
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