The formula for the are of a trapezoid is as follows:

where the b₁ and b₂ are the lengths of the bases and the h is the height of the trapezoid.
Substitute the given values into the equation.

Simplify the expression inside the parentheses. Add.

Divide 4 by 2.

Multiply 17 by 2.

Therefore, the area is 34 cm squared.