math
posted by Lilly on .
Miguel cuts a square with a 5inch sides out of a circle with a 12inch diameter. Find the area of the remaining piece to the nearest tenth.
I don't undersand how to figure ou the problem.

Find the area of the circle. Then find the area of the square. Subtract the square's area from the circle's area.

so the answer is 12.7?

sorry my sister typed in her name so it says her name not mine
that's my answer...12.7 
I got a different answer.
Did you use this formula for the area of the circle? A = pi * r^2
Did you multiply 5 * 5 for the area of the square? 
yes ma'm

Circle:
3.14 * 36 = 113.04 square inches
5 * 5 = 25 square inches
113.04  25 = 88.04 = 88.0 square inches 
so the circle equals 3.14rsquare (r=3.5 square) and that equals 11
then for the square 5square and that equals 20
then 2011=9
the answer is 9? 
The radius is 6 inches.
Square that and multiply by 3.14 to find the area of the circle. See above.