What is the area of this figure? enter your answer as a decimal in the box. cm² a parallelogram with a length of 11 cm. a triangle atop the parallelogram has a short leg measuring 7 cm. a right triangle created inside the parallelogram has a long leg measuring 9 cm.

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.