Example 4 : In triangle abc the bisector ad of angle a is perpendicular to side bc show that ab = bc and triangle abc is an isosceles triangle’ Example 4 : In triangle abc the bisector ad of angle a is perpendicular to side bc show that ab = bc and triangle abc is an isosceles triangle' October 15, 2020 Category: Chapter 7 - Triangles , Maths , NCERT Class 9 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related