minta tolong caranya, mksi!!

~ AE/AD = EF/DC
8/14 = 12/DC
DC = 14 × 12 : 8
DC = 21 cm

~ AE/AD = AG/AB
8/14 = 16/AB
AB = 16 × 14 : 8
AB = 28

Luas ABCD
= 1/2 × (AB + DC) × AD
= 1/2 × (28 + 21) × 14
= 1/2 × 49 × 14
= 49 × 7
= 343 cm^2 (D)


Selamat belajar, semoga membantu :)