Find the area of the triangle or quadrilateral.

Answer:
= 42 in^2
Step-by-step explanation:
This figure is a trapezoid
The area of a trapezoid is given by
A = 1/2 (b1+b2) h where b1 and b2 are the top and bottom bases and h is the height
A = 1/2( 13+8)* 4
A = 1/2(21)*4
= 42 in^2