Name:____________________________
12.3 Surface Area of Pyramids and Cones
1. Find the lateral area and the surface area of the regular pentagonal pyramid.
2. Find the lateral area and the surface area of the right cone.
3. The traffic cone can be approximated by a right cone with a radius of 6.3 inches and a height of 18 inches. Find
the lateral area of the traffic cone.
4. Find the lateral area and the surface area of the composite solid.
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5. Describe how (a) multiplying the base edge lengths by 2 and (b) multiplying all the linear dimensions by 2 affects
the surface area of the square pyramid.