Question

In a triangle ABC is the bisector of angle A,meeting side BC at D ,then if BD=2.5cm,AB=5cm and AC=4.2cm,find DC

Answer 1

Step-by-step explanation:

Hope this helps u

Answer 2

Step-by-step explanation:

Given in △ABC, AD is the bisector of angle A

By internal angle bisector theorem, the bisector of vertical angle of a triangle divides the base in the ratio of the other two sides.

AB/AC=BD/DC

thus, 5/4.2=2.5/DC

or,  DC=2.5 into 4.2/5

thus, DC=2.1

Here is ur answer.Hope u find it helpful.

Thanku