Hello, knuckles1234!

It helps if you plotted the points.Prove that the points with the position vectors:

in the xy-plane

are the vertices of a square.

Code:B | (-1,6)* | | C | (-5,3) * | A | *(2,2) | - - - - - - - - + - - - - - - ( -2,-1)* | D |

We have: .

. . Quadrilateral is a.rhombus

. . Hence: .

Therefore, is a.square