Chapter 12

12.3 Surface Area of Pyramids and Cones

Pyramid

• A polyhedron in which the base is a polygon and the lateral faces are triangles with a common vertex

Regular Pyramid

• A pyramid with a regular polygon for a base.

• Height Meets the base at its center

Theorem 12.4 Surface Area of a Regular Pyramid

PlBS2

1

• B = Area of the base

• P = Perimeter of the Base

• l = Slant height

Find the Surface area of the following Regular Pyramid

1. Find Area of Base

2. Find Slant height

3. Find Perimeter of Base

4. Put numbers in formula

5. Evaluate

Homework # 68Pg 738 1-7, 12-19