Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Normal Size Small Size show me how

# Chapter 10 - Geo.

### Chapter 10 Vocabulary - Properties of Circles

Word | Definition |
---|---|

center of a circle | see circle |

central angle | an angle whose vertex is the center of the circle |

chord | a segment whose endpoints are on a circle |

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

circumscribed circle | the circle that contains the vertices of an inscribed polygon |

congruent arcs | two arcs that have the same measure and are arcs of the same circle or of congruent circles |

congruent circles | two circles that have the same radius |

diameter of a circle | a chord that passes through the center of a circle; the distance across a circle through its center |

external segment | the part of a secant segment that is outside the circle |

inscribed angle | an angle whose vertex is on a circle and whose sides contain chords of the circle |

inscribed circle | a polygon whose vertices all lie on a circle |

intercepted arc | the arc that lies in the interior of an inscribed angle and has endpoints on the angle |

major arc | part of a circle that measures between 180 degrees and 360 degrees |

measure of a major arc | the difference between 360 degrees and the measure of the related minor arc |

measure of a minor arc | the measure of the arc's central angle |

minor arc | part of a circle that measures less than 180 degrees |

radius | 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; plural radii |

secant line | a line that intersects a circle in two points |

secant segment | a segment that contains a chord of a circle and has exactly one endpoint outside the circle |

segments of a chord | when two chords intersect in the interior of a circle, each chord is divided into two segments called segments of the chord |

semicircle | an arc with endpoints that are the endpoints of a diameter of a circle; the measure of a semicircle is 180 degrees |

standard equation of a circle | the standard equation of a circle with center (h, k) and radius r is (x - h) squared + (y - k) squared = r squared |

tangent line | a line in the plane of a circle that intersects the circle in exactly one point, the point of tangency |

Created by:
kgatling