Posted by Lilly on Tuesday, February 17, 2009 at 8:17pm.
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.
math - Ms. Sue, Tuesday, February 17, 2009 at 8:21pm
Find the area of the circle. Then find the area of the square. Subtract the square's area from the circle's area.
math - zyquaria, Tuesday, February 17, 2009 at 8:32pm
so the answer is 12.7?
math - Lilly, Tuesday, February 17, 2009 at 8:34pm
sorry my sister typed in her name so it says her name not mine
that's my answer...12.7
math - Ms. Sue, Tuesday, February 17, 2009 at 8:36pm
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?
math - Lilly, Tuesday, February 17, 2009 at 8:41pm
math - Ms. Sue, Tuesday, February 17, 2009 at 8:50pm
3.14 * 36 = 113.04 square inches
5 * 5 = 25 square inches
113.04 - 25 = 88.04 = 88.0 square inches
math - Lilly, Tuesday, February 17, 2009 at 8:52pm
so the circle equals 3.14rsquare (r=3.5 square) and that equals 11
then for the square 5square and that equals 20
the answer is 9?
math - Ms. Sue, Tuesday, February 17, 2009 at 8:58pm
The radius is 6 inches.
Square that and multiply by 3.14 to find the area of the circle. See above.
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