Equation of a Circle

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Examples, videos, worksheets, solutions, and activities to help Geometry students learn how to find the equation of a circle.

The following figure shows the equation of a circle with center (h,k) and radius r. Scroll down the page for more examples and solutions.
Equation Circle

Equations of Circles Pt 1

Equations of Circles Pt 2

Equations of Circles Pt 3

Equations of Circles Pt 4

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
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