1. Surface Area of Pyramids and Cones
Section 12-3
Surface Area of Pyramids and Cones

2. Theorem 12-4 Surface Area of a Regular Pyramid
The surface area S of a regular pyramid is
where B is the area of the base, P is the perimeter of a base and l is the slant height.

3. If you are missing the slant height on a square pyramid, use the Pythagorean Theorem

4. Theorem 12-5 Surface Area of a Right Cone
The surface area S of a right cone is
where B is the area of the base, r is the radius of a base and l is the slant height.

5. If you are missing the slant height on a right cone, use the Pythagorean Theorem