See attachment. what would be the perpendicular lines of this sense there are 4 right anglrs being formed? i thought perpendicular lines had to be like like "line segment ab is perpendicular to line segment cd" or something like that. not just one

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.