Editing Circle
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[[[> IMG:circle1.png ]]] The circle is a plane curve. It is a conic section. The circle is defined as the path of a point (locus) which moves such that its distance (called the radius) from a fixed point (called the centre) is a constant. When the centre is /*(0,0)*/ and the radius is /*r*/ the equation of the circle in Cartesian Coordinates is EQN:x^2+y^2=r^2 This is closely related to the Pythagoras' Theorem. ---- One of the Named Curves on this site.