Polar

If two points and are Inverse with respect to a Circle (the Inversion Circle),then the straight line through which is Perpendicular to the line of the points is called the polar of with respect to the Circle, and is called the Pole of the polar.

References

Dörrie, H. 100 Great Problems of Elementary Mathematics: Their History and Solutions. New York: Dover, p. 157, 1965.

Johnson, R. A. Modern Geometry: An Elementary Treatise on the Geometry of the Triangle and the Circle. Boston, MA: Houghton Mifflin, pp. 100-106, 1929.

• Cupolarotunda
• Curl
• Curlicue Fractal
• Curl Theorem
• Current
• Curtate Cycloid
• Curtate Cycloid Evolute
• Curvature
• Curvature Center
• Curvature Scalar
• Curvature Vector
• Curve
• Curve of Constant Breadth
• Curve of Constant Precession
• Curve of Constant Slope
• Curve of Constant Width
• Curvilinear Coordinates
• Cushion
• Cusp
• Cusp Catastrophe
• Cusp Form
• Cusp Map
• Cusp Point
• Cutting
• Cut-Vertex