tlng ya yg nmr 5 ! dik= ab=15cm ad=12cm cb=6cm dit=ak?

[tex] \frac{AK}{BK}= \frac{AD}{BC} [/tex]
[tex] \frac{x}{15-x}= \frac{12}{6} [/tex]
[tex] \frac{x}{15-x}=2 [/tex]
x = 30 - 2x
3x = 30
x = 10 cm

jawab : C