2. Warm up! Find the surface area of the backpack to the nearest inch:

3. The base is 12 in, but what is the height? (Hint: what is the radius of the circle?) The back has the same area:

4. The left side has the same area:

6. The back has the same area:

9. Spheres Geometry Unit 6, Day 6 Mr. Zampetti

10. What is a Sphere? Definition: A 3-dimensional circle. Examples:

11. Formulas Surface Area Volume

12. Example #1 Calculate the volume of: 15” V = 4/3 r 3 V = 4/3(15) 3 V 14130in 3

13. Example #2 Calculate the volume of: V = 4/3 r 3 V = 4/3(3.9) 3 V 248.349in 3

14. Example #3 Calculate the surface area of: S = 4r 2 S =4(6.1) 2 S 467.3576 in 2

15. Homework Work Packet: Spheres