Question

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

Answer 1

`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)}`