Answer:

A = 3.14 x 6 squared
A = 3.14 x 36
A = 113.04 square feet

Notes & Guided Practice

Summary:

• To find the area of a circle, square the radius and multiply the answer times 3.14.

On the Web: Check out the world's largest ball of twine. If you took a chainsaw and cut it in half (and I know Andrew and Matt would enjoy that quite a lot), what would be the area of the circle formed? Hint: you can use the circumference to find out what the diameter is! Look at example 3 on page 387!

Now suppose this guy cheated and the core of the ball is a basketball with a diameter of 10 inches. What would the area of the twine be then? (Hint: what is the area of the ball if you cut it in half--and yes Brenden, I know it would deflate--but let's just pretend it keeps its shape.)