1. Stand Quietly

2. Lesson 8.1 Volumes of Cylinders

3. Warm-Up # 27 (10/31/16) =
2. Round to the nearest tenths.
3. Round to the then nearest hundredth.
4. Explain how you can find the volume of a cylinder.

4. Homework (10/31/2016)
Lesson 8.1 Volume of a Cylinder worksheet

5. Volume of a Cylinder
A cylinder is a special type of prism with a circular cross-section.
A cross-section is the surface of the shape in which you can slice into equal parts. h r
Volume = area of cross-section × height
Recall that the area of a circle is equal to πr2.
Volume (V) =

6. Cylinders Cylinders are right prisms with circular bases.
Therefore, the formulas for prisms can be used for cylinders.
Volume (V) = Bh = h
2πr h

7. YOUTUBE VIDEO: https://www.youtube.com/watch?v=Bb_XJ7UPDlM

9. Lesson 9-3: Cylinders and Cones

10. Example
V = πr2•h
V = π(3)2•(4)
V = 36π

11. Pieces Missing Find the volume of concrete used to make this pipe
Volume of Concrete = Volume of Big Cylinder – Volume of Small Cylinder (hole)

12. What shape is present here?

13. What 3D shapes can you see?

14. HOME WORK
Find the Volume of the Solid. To 1 decimal place

15. Homework/Challenge
Challenge Question