Across |

1. | Device for measuring angles |

3. | A proposition that is being investigated, it has yet to be proven |

5. | A point in the middle of two others |

6. | Angle that measures 90 degrees exactly |

8. | To divide a angle into three congruent parts |

10. | To divide a segment or an angle into two congruent parts |

11. | Angle with measure less than 90 degrees |

15. | Three sided polygon |

17. | A fundamental statement that is assumed to be true without proof |

20. | Not lying on the same line |

21. | A straight set of points that extends off into infinity in both directions |

24. | Two angles with the same measure |

27. | Line on which every point represents a real number |

28. | Two points on a line, and all the points between those two points |

29. | A mathmatical statement that has been proven |

30. | Point of an angle where two rays interset |