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1. | A point at either the end of a line segment, or arc, or the initial point of a ray. |

2. | Two collinear rays whose intersection is in exactly one point are called ______ rays. |

3. | A triangle with no congruent sides. |

4. | Two angles the sum of whose measures is 180 degrees. |

5. | To examine methodically by separating into parts and studying their relationships. |

7. | The length of or distance around a circle. |

8. | Two or more coplanar lines that do not intersect are called _______ lines. |

9. | A point that divides a line segment into two congruent line segments. |

10. | The measure of the steepness of a line; the ratio of vertical change to horizontal change. |

13. | The point of intersection of the two rays that form the sides of the angle. |

14. | A set of angles formed on each of two or more lines cut by a transversal that are in the same position relative to each line and to the transversal. |

15. | Lines that share a common point. |

17. | A ray that divides an angle into two adjacent congruent angles is called an angle _______. |

18. | Any three or more points that lie in the plane. |

20. | An undefined term in geometry usually visualized as a dot representing a nondimensional location in space. |

23. | A geometric figure formed by two rays that have a common endpoint. |

24. | Two non-coplanar lines that do not intersect are ________. |