1. Surface Area of Pyramids and Cones
Goal –
to find the surface area of a pyramid and the surface area of a cone

2. Pyramids & Cones
Pyramid – a polyhedron where the base is a polygon and the lateral faces are triangles with a common vertex.
Cone– a solid with a circular base and a vertex that is not in the same plane as the base.

3. Pyramids are classified by the shapes of their bases

4. Surface Area versus Lateral Area of a Pyramid
The lateral area of a pyramid:
LA = P = Perimeter of the base
l = slant height
The surface area of a pyramid:
SA = B = Area of the base

5. Example

6. Surface Area versus Lateral Area of a Cone
The lateral area of a cone:
LA = r = radius of the base
l = slant height
The surface area of a cone:
SA =

7. Example

8. Students

9. Students

10. Students