Circle Calculator

Learn how to graph the equation of a circle by completing the square. Completing the square will allow us to transform the equation of a circle from general

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How to find the center and radius of a circle from its equation

So, the center of the circle is at (a, b) = (1, 2). We can then use the center and any point on the circle to find the radius, by using the distance formula (more detail on this method below). Find The Radius Of A Circle From An Equation. To find the radius of a circle from an equation, we always want to convert to standard form.
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How To Find The Center and Radius of a Circle

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