ka tolong nomor 9-10 sama caranya kak

9. BD^2 = AD × CD
12^2 = 6 × CD
144 = 6 × CD
CD = 144/6 = 24 cm (D)

10. 4/6 = x/6
x = 4
CD = AB + x = 10 + 4 = 14 cm (A)