Answer
h = 20
Work Step by Step
Substitute the values for A, B, and b into the equation:
A = $\frac{1}{2}$h(B + b)
180 = $\frac{1}{2}$h(11 + 7)
Solve for h by first multiplying both sides by 2:
360 = h(18)
Divide both sides by 18:
20 = h
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