1. 9.2; 11-13, 24-26, 40
11. 5
12. ~50
13. ~25

2. 9.3 Surface Area of Pyramids and Cones
Goal: Find the surface area of pyramids and cones.

3. Slant Height
Slant Height
The slant height is the length of the hypotenuse of the right triangle formed by the height of the pyramid and half the length of the base.

4. 1. Slant Height of a Pyramid
141 feet

5. Surface Area of a Pyramid
A = Area of base
P = Perimeter of base
l = Slant height
Surface Area = A + ½ P l

6. 2. Find Surface Area of a Pyramid
96 square feet

7. Find Surface Area
360 ft2
175 square in.
~191.1 cm2

8. Surface Area of a Cone
Area of a Base
Lateral Area

9. 3. Find the Surface Area of a Cone
942 ft2

10. Find Surface Area of Cylinders
151 ft2
75 cm2

11. Homework
Day 1: Pyramids
9.3 pg
9, 11, 12, 14-17, 21