# Difference between revisions of "Circle"

(→Other Properties: clipped technically incorrect info (diameter is a segment, perp bis is a line)) |
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*The [[locus]] of points distance <math>\displaystyle {r}</math>(radius) from center <math>{O}</math> | *The [[locus]] of points distance <math>\displaystyle {r}</math>(radius) from center <math>{O}</math> | ||

*A cross section of a cone or cylinder parallel to the base. For more on this, see [[Dandelin Spheres]], a commonly used method of deriving all [[Conic sections]]. | *A cross section of a cone or cylinder parallel to the base. For more on this, see [[Dandelin Spheres]], a commonly used method of deriving all [[Conic sections]]. | ||

− | *<math>(x - a)^{2} + (y - b)^{2} = r^{2} </math> for a circle centered at <math>(a,b)</math> with radius <math>{r}</math> | + | * All x, y such that <math>(x - a)^{2} + (y - b)^{2} = r^{2} </math> for a circle centered at <math>(a,b)</math> with radius <math>{r}</math> |

==Formulas== | ==Formulas== |

## Revision as of 12:47, 24 June 2006

## Definition

- The locus of points distance (radius) from center
- A cross section of a cone or cylinder parallel to the base. For more on this, see Dandelin Spheres, a commonly used method of deriving all Conic sections.
- All x, y such that for a circle centered at with radius

## Formulas

**Area****circumference**

## Other Properties

- awaiting diagrams to add stuff on inscribed angles + tangents.