10. Exercise Problem V

In a classroom, \(4\) friends are seated at the points \(A, B, C\) and \(D\) as shown in the following figure. Champa and Chameli walk into the class and after observing for a few minutes Champa asks Chameli, “Don’t you think \(ABCD\) is a square?” Chameli disagrees.  Using distance formula, find which of them is correct.

 

 

Ans:

 

Champa was wrongcorrect