Question

Calcule:
(B+b) x h/2
 Sendo que:
B= 9
b=4
h=3

Answer 1

$\frac{(B+b).h}{2} \\ \\ \frac{(9+4).3}{2} \\ \\ \frac{13.3}{2} \\ \\ \frac{39}{2} = \boxed{19,5}$