Question taken from RD sharma
Chapter no. 4
Chapter name:- Triangles
Exercise :- 4.3
This is very basic and important questions.
In this question we have a ∆ABC,
AD is the bisector of ∠A, meeting side BC at D.
Also it is given that BD = 2.5 cm, AB = 5 cm and AC = 4.2 cm,
Now we have to find DC
Understanding and learning CBSE maths
RD sharma, DHANPAT RAI publication