The measure of angle e, the angle of elevation from point a to point b, is (3x+1). the measure of angle s, the angle of depression from point b to point a, is 2(x+8). find the measure of each angle.

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.