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