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15 December, 20:52

3. Pi is defined as the ratio of the circumference of a circle to the diameter of that circle. Which of the

following correctly explains why the formula for the circumference of a circle is 2xr?

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  1. 16 December, 00:14
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    Pi times r equals the diameter of the circle. The diameter is a half circle, so when you multiply it by 2, you get the distance around the entire circle, or the circumference.
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