The formula for the are of a trapezoid is as follows:
[tex]A=\frac{(b_1+b_2)h}{2}[/tex]
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.
[tex]A=\frac{(5+12)(4)}{2}[/tex]
Simplify the expression inside the parentheses. Add.
[tex]A=\frac{17(4)}{2}[/tex]
Divide 4 by 2.
[tex]A=17(2)[/tex]
Multiply 17 by 2.
[tex]A=34[/tex]
Therefore, the area is 34 cm squared.
