Question

The bottom shape is a cube with base edges of 6 inches. The top shape is a right pyramid with a height of 4 inches. What is the surface area of this composite figure?

180 in2

60 in2

240 in2

36 in2

Answer 1

surface area measures the area of the outside
think of the bottom part as a bunch of squares, and the top part as triangles
then you just have to find the area of all the squares and triangles

each square has sides of length 6
each triangle has base of 6 but unknown height....its NOT 4
4 is the vertical height, you need to find the slant height which is height of triangle face
use pythagorean thm.....h^2 = 3^2 + 4^2

hope this helps

Answer 2

thanks!