perhatikan segitiga di samping tentukan nilai c dan d

12/8 = (12+c)/(8+3)
12/8 = (12+c)/11
sederhanain dulu yg kiri bagi 4
3/2 = (12+c)/11
2(12+c) = 3×11
24 + 2c = 33
2c = 33-24
c = 9/2
c = 4,5

d/11 = 15/8
8d = 11 × 15
d = 165/8
d = 20,625