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Subsections

- Circle
- Ellipse
- Hyperbola
- Parabola
- Conic

## Conic section

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Circle

`Circle[`point M, number r`]`
  Circle with midpoint M and radius r

`Circle[`point M, segment s`]`
  Circle with midpoint M and radius = Length[s]

`Circle[`point M, point A`]`
  Circle with midpoint M through A

`Circle[`point A, point B, point C`]`
  Circle through A, B and C

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Ellipse

`Ellipse[`point F, point G, number a`]`
  Ellipse with foci F, G and principal axis length a. Condition: 2a > Distance[F,G]

`Ellipse[`point F, point G, segment s`]`
  Ellipse with foci F, G and principal axis length a = Length[s]

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Hyperbola

`Hyperbola[`point F, point G, number a`]`
  Hyperbola with foci F, G and principal axis length a. Condition: 0 < 2a < Distance[F,G]

`Hyperbola[`point F, point G, segment s`]`
  Hyperbola with foci F, G and principal axis length a = Length[s]

###
Parabola

`Parabola[`point F, line g`]`
  Parabola with focus F and directrix g

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Conic

`Conic[`point A, point B, point C, point D, point E`]`
  Conic section through five points (no four lie on one line)

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