# 2011 AMC 8 Problem 20

#### shanghai

##### Member
Quadrilateral $$ABCD$$ is a trapezoid, $$AD = 15$$, $$AB = 50$$, $$BC = 20$$, and the altitude is $$12$$. What is the area of the trapezoid?

$$\textbf{(A) }600\\\textbf{(B) }650\\\textbf{(C) }700\\\textbf{(D) }750\\\textbf{(E) }800$$