1. 10-4 Surface Areas of Pyramids
Objective – Find the surface area of pyramids and cones.

2. Pyramids
Slant Height
Height
Pyramid
Pyramid

3. Theorem 10-3 Lateral Area and Surface Area of a Regular Pyramid
Base Perimeter
Slant Height B
Surface Area
Lateral Area
Base Area

4. #1 Finding Surface Area of a Pyramid
Find the surface area of a square pyramid with base edges 5 m and slant height 3 m.

5. #2 Finding Surface Area of a Pyramid
Find the surface area of a regular hexagonal pyramid with a slant height 20 in and sides 8 in.

6. #3 Finding Surface Area of a Pyramid
Find the lateral area of a regular hexagonal pyramid. l

7. Cones
Slant Height
Cone

8. Theorem 10-4 Lateral Area and Surface Area of a Cone Lateral Area
Radius
Slant Height
Surface Area
Lateral Area
Base Area

9. #4 Finding the Surface Area of a Cone
The radius of the base of a cone is 5 m. Its slant height is 13 m. Find the surface area.

10. #5 Finding the Surface Area of a Cone
The diameter of the base of a cone is 30 m. Its slant height is 25 m. Find the surface area.

11. #6 Finding the Surface Area of a Cone
Find the slant height and the lateral area to the neatest whole number.

12. Assignment
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