Across |

1. | --- angles are formed opposite each other when two lines intersect and are always congruent. |

8. | lines that have the same length (three words) |

9. | polygon with eight sides and angles |

10. | can be rotated about a point (two words) |

13. | triangle that has one right angle (two words) |

14. | moves a figure without changing its size or shape |

15. | the line the figure is flipped over (three words) |

16. | parallelogram with four right angles and opposites sides are parallel and congruent |

17. | A --- angle measures exactly 90. |

18. | have the same shape and size (two words) |

19. | straight path that has no thickness and extends forever |

20. | line segment that connects two non-adjacent vertices |

24. | flat surface that has no thickness and extends forever |

25. | triangle that only has acute angles (two words) |

27. | An --- angle measures greater than 0 and less than 90. |

29. | Line --- is part of a line made of two endpoints and allthe points between |

33. | --- lines are lines that lie in different planes. |

35. | four sided figure with opposite sides that are parallel and congruent and opposite angles are congruent |

36. | --- angles have the same measurement. |

41. | formed by two rays with a common endpoint |

42. | plane figure with four sides and four angles whose angles have a sum of 360. |

43. | polygon with nine sides and angles |

44. | exact location that has no size |

46. | polygon with six sides and angles |

47. | can be folded or reflected so that the two parts are congruent (two words) |

48. | polygon with ten sides and angles |