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# Algebra 2 unit 4

Term | Definition |
---|---|

Conic Section | intersection of a plane with one or both nappes of a double cone. |

Circle | The locus points of points in a plane that are equidistant from one point, called the center |

Ellipse | The locus of points in a plane such that the sum of the distances from any point in the locus to two points, called the foci, is a constant |

Hyperbola | The locus of points in a plane such hat the difference of the two fixed points called the foci is a constant |

Parabola | The locus of points in a plane that are equidistant from a line and a point not on the line |

Major Axis | The line through the vertices of an ellipse |

Transverse axis | the line joining the two vertices of an ellipse |

Directrix | the line along with a point not on the line which is used to generate a parabola |

Eccentricity | a Measure of how close an ellipse is to being circular |

Astmptote | one of two lines through the center of a hyperbola that the hyperbola approaches but never intersects |

Focus | one of two points such that the difference of the distances from any point on the hyperbola to the foci is a constant |

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