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Equation of a Circle
If a circle is centered at the origin, write an equation describing every point on the circle. Your equation should use the radius of the circle and the x-coordinate and y-coordinate of ANY point on the circle.
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Related External Resources |
Examples of Equation of the Circle
These examples show how to find an equation and graph a circle based on different criteria.
School Bus Geometry
Determine the changes in the graph of a circle in this form of geometry.
 Submit your idea for an investigation to InterMath.
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