Answers

2014-03-04T21:03:28+08:00
THE FORMULA OF CIRCUMFERENCE OF A CIRCLE IS... C = 2(pi)r^2
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2014-03-05T09:55:03+08:00
Multiply the formula

C="pi"d

or in other hand

D=2x___x3.14

the value of the "pi" is 3.14
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