**MA341 HOMEWORK #9
Due Friday, December 3
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**Book, Section 3.8, #6, 8.****Write up your solutions to the circles on spheres problems in Section 8.2 of my notes. In particular**- Find and prove the formula for the circumference
*C*of a circle of radius*r*. - What is
*C*when ? When ? Why does this make sense? - Prove that when .
- Prove that
- Find and prove the formula for the area of
*A*of a circle of radius*r*. - What is
*A*when ? When ? Why does this make sense? - Prove that when .
- Prove that

- Find and prove the formula for the circumference

Wed Nov 24 07:42:06 EST 1999