AlgebraLab

Circumferences and Areas of Circles

By C Roach

Directions and/or Common Information:

Find the circumference for each circle.

If a circle has a circumference of 7 meters, what is the length of its diameter?

If a circle has a circumference of 72 inches, what is the length of its radius?

Directions and/or Common Information:

Find the area of each circle.
Find the diameter of a circle whose area is 88 cm2.

Mary's neighbor has a pool that she wants to emulate in her own backyard.  The pool is unique because it is a perfect circle and unlike any pool she has seen.  Mary needs to hire a builder, but first she needs to find out the area of her neighbor's pool.  If her neighbor's pool's circumference is 60ft, what is the best possible estimate of the pool's area?