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A. Write the formula for the area of a trapezoid.
b. Solve the formula for h.

User Ivan Dimov
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a.\\A=(a+b)/(2)\cdot h


b.\\(a+b)/(2)\cdot h=A\ \ \ \ |\cdot2\\\\(a+b)h=2A\ \ \ \ \ |:(a+b)\\eq0\\\\\boxed{h=(2A)/(a+b)}

User Hypaethral
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