tolong bantu jawab soal mtk

Kesebangunan

CF/BC = EF/AB
6/6+14 = 8/AD+8
6/20 = 8/AD+8
3/10 = 8/AD+8
3(AD+8) = 8 x 10
3AD+24 = 80
3AD = 80-24
3AD = 56
AD = 56/3
AD = 18 2/3 (C)

*semoga membantu. sukses selalu ^_^