1.

In Fig, if AC = BD, then prove that AB = CD.

Answer»

Data: In this figure AC = BD. 

To Prove : AB = CD 

Proof: AC = BD (Data) → (i) 

But, AC = AB + BC 

and BD = BC + CD. 

Substituting value of (i) 

AC = BD 

AB + BC = BC + CD

∴ AB = CD.



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