1 PYRAMIDS : Martha’s clubhouse is shaped like a square pyramid with four congruent equilateral triangles for its sides. All of the edges are 6 feet long. What is the total surface area of the clubhouse including the floor? Round your answer to the nearest hundredth? 2 TRACK: A running track has an inner and outer edge. Both the inner and outer edges consist of two semicircles joined by two straight line segments. The straight line segments are 100 yards long. The radii of the inner edge semicircles are 25 yards each and the radii of the outer edge semicircles are 32 yards each. What is the area of the track? Round your answer to the nearest hundredth of a yard?

3 SEMICIRCLES Bridget arranged three semicircles in the pattern shown. The right triangle has side lengths 6, 8, and 10 inches.
3a. What is the total area of the three semicircles? Round your answer to the nearest hundredth of a square inch.
3b. If the right triangle had side lengths √21,