find the total area

answer choices-
16 centimeter squared
52 centimeter squared
32 centimeter squared
124 centimeter squared

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9

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.

What is the length of ac in the given triangle?