Find the area of this trapezoid.
A. 240 cm2
B. 288 cm2
C. 312 cm2
D. 336 cm2

Answer:
b. 288cm^2
Step-by-step explanation:
[tex]a = \frac{a + b}{2} h[/tex]
[tex] \frac{15 + 21}{2} (16)[/tex]
[tex]a = 288[/tex]