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Posted by on Sunday, October 2, 2011 at 9:06pm.

the height of a triangle is 10m longer than twice its base. its area is 176m^2. Find the lengths of its height and base.

  • trigonometry - , Sunday, October 2, 2011 at 9:35pm

    base = x
    height = 2x+10

    (1/2)(x)(2x+10) = 176
    2x^2 + 10x = 352
    x^2 + 5x - 176 = 0
    (x + 16)(x-11) = 0
    x = -16 or x = 11 , but x > 0

    so x = 11

    base is 11, height is 32

    check: (1/2)(11)(32) = 176

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