In a classroom,
4 friends are seated at the points
A,
B,
C and
D as shown in Fig. Champa and Chameli walk into the class and after observing for a few minutes Champa asks Chameli, Dont you think
ABCD is a square? Chameli disagrees. Using distance formula, find which of them is correct. why?
![465327.PNG](https://search-static.byjusweb.com/question-images/toppr_ext/questions/465327.PNG)