panjang AB=20,DE=15,danCD=24maka panjang CA adalah

15:20 = 24:X
15X = 480
X = 32

X = CA

[tex] \frac{24}{24+x} = \frac{15}{20} \\ \frac{24}{24+x} = \frac{3}{4} \\ \frac{8}{24+x} = \frac{1}{4} \\ 24+x = 32 \\ x = 8[/tex]

Panjang CA = 24 + 8
Panjang CA = 32