Friday, July 15, 2011

Math

The ratio of the circumference of a circle to the perimeter of a square is 2 : 1. Each side of the square measures 22 cm. What is the measure of the radius of the circle?
 My answer is 28
Perimeter of the square is 4 x 22 equal 88 cm. = 2 x 88 = 176 cm. This should be equal to 2 x 22/7 x r.
Therefore, r = 176 x 7/22 x 1/2 = 28 cm.

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