1. By Mr. Martin

3. Pyramid Pyramid: A polyhedron with only one base (can be any shape) and the lateral faces are all triangles that meet at a common vertex. Altitude: The perpendicular segment from the vertex to the base (height is the length of the altitude) Slant Height: The length of the altitude on a lateral face of the pyramid (denoted with an l)

4. P = Perimeter of the base L = Slant Height B = Area of the Base

5. P = 4 * 3 P = 12 L = 2.5 LA = (1/2) * 12 * 2.5 LA = 15

6. B = ??B = L * W B = 3*3 = 9 SA = LA + B (15) + 9 SA = 24

8. P = 7 * 6 P = 42 L = 13.4 LA = (1/2) * 42 * 13.4 LA = 281.4

9. B = ??B = (1/2)ap B = (1/2)(6.1)(42) B = 128.1 SA = LA + B (281.4) + 128.1 SA = 409.5

10.  To solve for LA of pyramids…all you need are 2 letters…  P  L  If you don’t have the slant height…but you have the altitude…you can use the Pythagorean Theorem!

12. Whaa???? We know the altitude but not the slant height…..

14. Now…find the surface area!!

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