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Equation of a Circle

Related Topics:
More Lessons for Geometry
Math Worksheets



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

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.


You can use the free Mathway calculator and problem solver below to practice Algebra or other 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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