If ABC, D is the midpoint of AC, F is a point on AB such that CF bisects BD at E. IF AF = 18 cm, then the length of BF is:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 9 cm.
Let P be a point on CF such that FE = EP
BF || PD and FA || PD
BPDF becomes a parallelogram
PD = AF/2 = 18/2 = 9 cm
BF = PD = 9 cm