tolong dibantu beserta cara pengerjaannya please!

Keliling = 72 cm
2(3x) + 2(6x) = 72
6x + 12x =72
18x = 72
x = 72/18
x = 4

AD = BC = 3x = 3(4) = 12 cm
AB = DC = 6x = 6(4) = 24 cm

Luas ABCD = AB × DE
= 24 × 6
= 144 cm2

Luas = BC × DF
144 = 12 × DF
DF = 144/ 12
DF = 12 cm