1. Section 12-3 Cylinders

2. cylinder It is like a prism except that its bases are circles instead of polygons. Bases

3. Right cylinder The segment joining the centers of the circular bases is an altitude.

4. Parts of a Right Cylinder The length of the altitude is called the height A radius of a base is the radius of the cylinder r h

5. An Example of an oblique cylinder

6. The formulas for cylinders are related to the formulas for right prisms!

7. Why? Cylinders and prisms both have two, congruent, parallel bases

8. Theorem 12-5 The lateral area of a cylinder equals the circumference of a base times the height of the cylinder.

9. In other words…

10. Total area T.A. = L.A. +

11. Theorem 12-6 The volume of a cylinder equals the area of a base times the height of the cylinder.