Tolong dijawab No 30 - 31 .. pakai caranya yaa .

Bab Bangun Datar
Matematika SMP Kelas VII

30] AD = BC = 10 cm
AB x DE = BC x DF
24 x 8 = 10 x DF
DF = 192 : 10
DF = 19,2 cm

31] luas = 1/2 x a x t
luas = 1/2 x 15 x 12
luas = 90 cm²