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Example – 3 : In , right angled at A, AD is drawn in such a way that If BD = 9cm and DC = 7cm, find AB.

Solution :

Example – 4 : In the adjoining diagram, ABC is a triangle right angled at A. AD is perpendicular to BC.

Prove that

Solution :

1. 
   

 

2. 
   

 

3. From (i) and (ii)