Am nevoie de ajutor! Urgent, dau coroana

Răspuns:
3.a) A=4*4:2=16:2=8 cm2
b) A=B*h:2=8*12:2=96:2=32cm2
c) A=6*8:2=48:2=24cm2
d) A=B*h:2=24*6:2=12*6=72cm2