Question

Sheldon cuts a circle with a diameter of 14 centimeters from a square piece of felt 15 inches on each side. In terms of pi, how much felt is left over?

Show Work

Answer 1

15 x 15 = 225 square inches
The circle cut from the felt
= PI * radius^2
= PI * 7^2
= 49 * PI
49 * PI = 153.94
225 -153.94 = 71.06
71.06 felt is left over

Answer 2

The entire area of the felt is 15 x 15 = 225 square inches
The circle cut from the felt =
circle area = PI * radius^2
circle area = PI * 7^2
circle area = 49 * PI
49 * PI = 153.94
Left over felt 225 -153.94 = 71.06