the radius of a circle is 12mm
what is the areaa of the circle to the nearest mm 2
please help??
2007-03-05 04:15:32 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
You use the formula:
A = pi*r^2 where A is the area of the circle, pi is a constant and r is the radius of the circle.
So you get: A = pi x 12 x 12
Using a calculator with a pi button you get A = 452.38 mm^2 which is 452 mm^2 to the nearest mm^2. Don't forget to give the units in your answer.
2007-03-05 04:44:00 · answer #1 · answered by Anonymous · 0⤊ 0⤋
452
2007-03-05 04:19:01 · answer #2 · answered by Barbara Doll to you 7 · 0⤊ 0⤋
A= pi * r^2
A = 3.14159 * (12)^2
A = 3.14159 *144 = 452.4mm^2 = 452
2007-03-05 04:20:56 · answer #3 · answered by Grant d 4 · 0⤊ 0⤋
12 squared is 144 times pie is around 452.16
2007-03-05 05:03:00 · answer #4 · answered by superface 2 · 0⤊ 0⤋
144.
2007-03-05 15:53:31 · answer #5 · answered by Anonymous · 0⤊ 0⤋