CPM Homework Help : INT2 Problem 2-81

Calculate the area of the trapezoid at right.
What strategies did you use?

Step 1:

$5^2 + c^2 = 13^2$
$-25 -25$

Step 2:

$\text{Area of a trapezoid }=\frac{1}{2}(b_{1}+b{_{2}})h$

A trapezoid with bottom base 18 + 5 feet, top base 12 feet and left side 13 feet. A right triangle is created by a line segment drawn from the upper left vertex perpendicular to the base with the base labeled 5 feet.