Tolong bantuan nya lah.

segitiga TBQ ≈ segitiga TAP
[tex] \frac{BQ}{BT} [/tex] = [tex] \frac{AP}{AT} [/tex]
misal, BT = a
[tex] \frac{5}{a} [/tex] = [tex] \frac{7}{12+a} [/tex]
(karena AT = AB + BT dan AB=7+5=12)
kali silang
60+5a = 7a
2a = 60
a = 30 cm
CT = BT - BC = 30 cm - 5 cm = 25 cm