1. Up Up and Away Jim Smith

3. Hot Air Balloon Surface area Volume

4. A Hot Air Balloon is a composite of a hemisphere and a truncated cone

5. Hemisphere Surface Area Surface Area Formula SA = 2πr 2

6. Cone Surface Area Surface Area Formula SA = πrl

7. Approximate Surface Area of Hot Air Balloon Total surface area of hot air balloon = surface area of hemisphere + surface area of cone – vertex tip of cone

8. Surface Area Summary ____ square feet of ___________is needed to make a hot air balloon.

9. Hemisphere Volume Volume Formula V = ⅔πr 3

10. Cone Volume Volume Formula V = ⅓πr 2 h

11. Approximate Volume of Hot Air Balloon Total volume of hot air balloon = surface area of hemisphere + surface area of cone – vertex tip of cone