A rectangle or piece of metal is 15 inches longer than it is wide squares with three sides inches long are cut from the four corners in the flaps are folded upward to form an open box if the volume of the box is 858 in.³ what were the original dimensions of the piece of metal

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.