Problem Solving with Coordinates of Parallel and Perpendicular Lines

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

Which part of a 2-column proof is the hypothesis of the conjecture? a) given b) reasons c) prove d) statements ! i think it's b but i'm not quite

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.