jawaban nomer 15 dan 16 apa

15) luas ∆ = 1/2 . AB . BC . sin B
= 1/2 . 16 . 10 . sin 150°
= 8 . 10 . 1/2
= 40 cm^2

16) luas jajar genjang = alas x tinggi
AB . DE = BC . DF
10 . 6 = 15 . DF
60 = 15 DF
DF = 60/15 = 4 cm