1. Volume: Pyramids and Cones
Lesson 11-3 Pages
Volume: Pyramids and Cones

2. What you will learn! How to find volume of pyramids.
How to find volume of cones.

3. Vocabulary
Cone

4. What you really need to know!
To find the volume V of a pyramid, use the formula V = 1/3 Bh, where B is the area of the base, and h is the height of the solid.

5. What you really need to know!
To find the volume V of a cone, use the formula V = 1/3 r2h, where r is the radius of the base, and h is the height of the solid.

7. Link to Pre-Made Lesson

8. Example 1:
Find the volume of the pyramid. If necessary, round to the nearest tenth.

11. Example 2:
Find the volume of the pyramid. If necessary, round to the nearest tenth.
Base are 19 cm2
Height 21 cm

12. Base are 19 cm2
Height 21 cm

13. Base are 19 cm2
Height 21 cm

14. Find the volume of the cone. If necessary, round to the nearest tenth.
Example 3:
Find the volume of the cone. If necessary, round to the nearest tenth.

15. Find the volume of the cone. If necessary, round to the nearest tenth.
Example 3:
Find the volume of the cone. If necessary, round to the nearest tenth.

16. Find the volume of the cone. If necessary, round to the nearest tenth.
Example 3:
Find the volume of the cone. If necessary, round to the nearest tenth.

17. Example 4:
When mulch was dumped from a truck, it formed a cone-shaped mound with a diameter of 15 feet and a height of 8 feet. What is the volume of the mulch? Round to the nearest whole number.

19. Example 4b:
How many square feet can be covered with this mulch if 1 cubic foot covers 4 square feet of ground?
4 x 471 = 1,884 ft2

20. Page 570
Guided Practice
#’s 4-9

22. Pages 568-570 with someone at home and study examples!
Read:
Pages with someone at home and study examples!

23. Homework: Pages
#’s 10-23, 27-34
Practice Quiz 1 #’s 1-5

29. Page
751
Lesson 11-3