In a triangle ABC, AD is the angular bisector and BD: DC = 2:1. If AB = 12 cm, find AC.
8 cm
6 cm
4 cm
12 cm
14 cm
ABAC=BDDC
AC = 6 cm
In △ABC, AB=3 cm, AC=4 cm and AD is the bisector of ∠A. Then, BD:DC is