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11 October, 06:56

The base of a triangle is 7 less than twice its height. if the area of the triangle is 102cm^2 find the length of the base

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  1. 11 October, 09:05
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    B=2h-7

    Area of a triangle: A=1/2 of bh

    replace b with 2h-7: A = (1/2) (2h-7) h=102 = > (2h-7) h=204

    2h^2-7h-204=0

    factor or use quadratic function to solve

    h=12

    b=2*-7=17
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