Conic Sections: Overview of Circle ( Click Circle )

( Click on the Blue Underlined Words for expanded explanations! )

Definition: A circle is a set of points equidistant from a single point. *

Equation: x² + y² = r² Center= (0,0) (x-h)² + (y-k)² = r² Center = (h,k)

Important Concepts for Circles: Center, Radius, Axis, Intercept(s)

Eccentricity (e=0) Distance: D=( (x-x)2 + (y-y)2)1/2 Midpoint: M = [(x+x)/2 , (y+y)/2)]

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Tom Love Malone College Fall 2007