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Question | Answer |

Chord | A line with each of its endpoints on a point on the circle |

Diameter | A chord that passes through the center of the circle |

Secant of a circle | A line that intersects a circle at exactly two points |

Tangent | A line that intersects a circle at exactly one point |

Point of tangency | Point of intersection where a line intersects a circle at exactly one point |

Radius | The distance from a point on the circle to the center |

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

Inscribed angle | An angle whose vertex is on the circle |

Arc | Any unbroken part of the circumference of a circle (named using two endpoints) |

Major arc | The largest arc formed by a secant and a circle (more than halfway around the circle) |

Minor arc | The smallest arc formed by a secant and a circle (less than halfway around the circle) |

Semicircle | Exactly half of a circle |

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