Question taken from RD sharma

Class 10th

Chapter no. 4

Chapter name:- Triangles

Exercise :- 4.3

This is very basic and important questions.

In this question ques we have been given the measure of sides of triangle ABC and we have to to find out if AD is Angle bisector of A or not by using triangles basic properties.

Understanding and learning CBSE maths

RD sharma, DHANPAT RAI publication

AB=8cm

AC=24cm

BD=6cm

BC=24=BD+DC=6+DC

CD=18cm

ACAB=248≈0.33 (1)

CDBD=186≈0.33 (2)

(1)=(2)

Hence AD is the bisector of ∠A of △ ABC