What is the surface area of this square pyramid?
Round your answer to the nearest tenth, if necessary.

43.8 yd²

66.6 yd²

105 yd²

171.6 yd²

The figure shows a square pyramid. The slant height is shown as a dashed line segment perpendicular to the base edge. The length of the base edge is 6.2 yard. The lateral edge makes a 60 degree angle with the base edge.

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.