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How to Find the Diameter of a Circle?

Answer

You can find out the diameter of a circle if you know it's circumference or radius. Then, you'd plug that information into the formula needed. If you know the radius, just multiply that by 2. If you have the circumference, you'd need to divide it by
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Q&A Related to "How to Find the Diameter of a Circle?"
1. Measure the distance between each focus point (a, b) and a single, shared point on the perimeter of the ellipse. 2. Add the two distances together: (a + b) This is the diameter
http://www.ehow.com/how_8685964_diameter-ellipse.h...
Formulas for a circle: Radius: r Diameter: d Circumference: C Area: A d = 2r C = 2 Pi r = Pi d A = Pi r² = Pi d²/4 C = 2 sqrt(Pi A) A = C²/4 Pi = Cr/2 http://mathforum.org
http://wiki.answers.com/Q/What_is_the_formula_for_...
http://www.chacha.com/question/how-to-find-the-dia...
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