Tolong dibantu yaa teman teman

AB/CD = AE/DE
AB/24 = 6/9
AB.9 = 24.6
9AB = 144
AB = 144/9
AB = 16 cm

misal panjang AB=n
6/9=n/24; (dikali silang)
24x6=9n
n=16 cm
maaf kalau salah, masih sama sama belajar :)