tolong jawab sama jalannya ya

L.∆ ABE = 1/2 × 5 × 12 = 30
L.∆ ABD = 1/2 × 5 × 8 = 20
L.∆ ABC = 1/2 × 5 × 4 = 10
Luas yang diarsir = (30+20) - 2(10)
= 30+20-20
= 30 cm²
Jawabannya B :)