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What is the radius of your inner circle?
Pop quiz, @NathanFillion , The radius of a circle is 3 centimeters. What is the …
Math: the radius of a circle is 3 centimeters. what is the circle's circumferenc…
Does anybody know anything about radius and diameter of a circle? LOL. :)
What is the formula for the circumference of a circle of radius r?
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