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1. | An area or portion that is distinct from others |

2. | States the measures of two adjacent arcs can be added |

3. | A line segment that bisects one of the vertex angles of a triangle |

4. | Passes through the center of a circle is called a diameter, and is the longest chord |

5. | The ratio of the hypotenuse to the shorter side adjacent to an acute angle (in a right triangle) |

7. | All corresponding angles are congruent. The ratios of the measures of corresponding sides are equal |

8. | A straight or plane that touches a curve or curved surface at a point, but if extended does not cross at that point |

10. | An angle formed by two chords in a circle which have a common endpoint |

12. | Two or more arcs n congruent circles are congruent if they have the same angle measure |

13. | The segment contained by a secant segment with an endpoint on the circle and at the fixed point outside the circle whose points all lie outside the circle |

14. | The arc that is formed when segments intersect portions of a circle and create arcs |

15. | In a circle is a polygon, vertices of which are placed on a circumference |

16. | An angle whose vertex is the center O of a circle and whose sides are radii intersecting the circle in two distinct points |

18. | A segment with one endpoint on a circle, one endpoint outside the circle,and one point between these points that intersects the circle |

19. | The segment of a circle is the region bounded by a chord an the arc subtended by the chord |

20. | Half of a sphere |