Is point a square? I was solving a problem where there are 4 points and we need to check if they form a square or not. Now if all 4 points are the same, is it square or not. My initial thought was it is a zero-sided square but wanted to clarify if my understanding is right or not. 

A point say (h,k) is a point circle:of zero radius.
$$(x-h)^2+(y-k)^2=0$$ or also a point-square  $$|x-h|+|y-k|=0.$$
