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Interactive Equation of Circle

Equation of Circle Interactive HTML5 Applet

Explore and discover the standard form equation of a circle using the interactive circle below. To move the circle just click and drag on either of the two points, and the circle's standard form equation will adjust accordingly. You can also see the general form of the circle's equation by clicking 'show general form'.

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Interesting Fact about Circumference and Area

Back to Circles