# Circle Equation

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To find the equation of a circle whose center is the origin and whose radius is 3 units in length.

### Keywords

circle, coordinate plane, circle on coordinate plane, coordinate plane example, coordinate plane geometry, equation of a circle### Galleries

Circles### Source

William Briggs, G.H. Bryan *The Elements of Coordinate Geomentry Part 1. The Equations and Properties of the right line and circle* (, : University Correspondence College Press Warehouse, ) 28

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