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The height of a triangle is 5 m less than its base. The area of the triangle is 42 m². What is the length of the base?

 Oct 30, 2021
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Triangle area = 1/2  b * h

   h = (h-5)                   42 = 1/2 * b * ( b-5)

                                      1/2 b^2 - 2.5 b - 42 = 0        b = 12 m

 Oct 30, 2021

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