1. Lesson 9.5 Volume of Pyramids and Cones Pages 510 - 512

2. Where does the Volume formula come from? Three pyramids with equal volume can be put together to form a prism. Each pyramid will have one-third of the volume of the prism. Volume of pyramidVolume of prism V = 1/3 B hV = B h (see picture on page 510)

3. Find the volume.

5. Volume of Cones Cones use the same volume formula that pyramids use. Since the base of a cone is a circle, you can substitute πr 2 for the area of the base. V = 1/3 B h = 1/3 πr 2 h (see picture on page 511)

6. Find the volume. Height (h) = 5 in Radius (r) = 4 in Slant height ( l ) = _____

7. Find the volume. Height (h) = ______ Radius (r) = 10 in Slant height ( l ) = 12 in.

8. Assignment: Pages 513 - 516 #10-32 even, 36-38all (show your work!)