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# Circle Vocabulary -1

### Definitions of Cricles

Question | Answer |
---|---|

A segment whose end points are on a circle. | Chord of a Circle |

A chord that passes through the center of a center. The distance across a circle through its center. | Diameter |

A line that intersects a circle in two points. | Secant of a Circle |

A line in the plane of a circle that intersects the cirlce in exactly one point, the point of tangency. | Tangent of a Circle |

The set of all points in a plane that are equidistant from a given point called the center of the circle. | Circle |

A segment whose endpoints are the center of the circle and a point on the circle. The distance from the center of a circle to any point on the circle. | Radius |

Two circles that have the same radius. | Congruent Cirlces |

An angle whose vertex is on a circle and whose sides contain chords of the circle. | Inscribed Angles |

An angle whose vertex is the center of the circle. | Central Angle |

The distance around a circle. | Circumference |

A portion of the circumference of a circle. | Arc length |

An arc with endpoints that are the endpoints of a diameter of a circle. | Semicircle |

Part of a circle that measures between 180 degrees and 360 degrees. | Major Arc |

Part of a circle that measures less than 180 degrees. | Minor arc |

Circles that lie in the same plane that share the same center. | Concentric Circles |

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