Across |

2. | A quadrilateral with two pairs of adjacent sides that are congruent. |

4. | Lying on the same line. |

7. | A 90° angle. |

10. | A trapezoid with base angles that are the same. |

11. | A line segment between two points on the circle or sphere which passes through the center. |

12. | The locus of all points that are a fixed distance from a given point. |

13. | A quadrilateral with two pairs of parallel sides. |

14. | The geometric figure formed at the intersection of two distinct lines. |

17. | When lines intersect and form a 90° angle they are this. |

18. | Two features that are situated the same way in different objects. |

20. | A polygon with five sides. |

23. | Exactly equal in size and shape. |

24. | A triangle which has an obtuse angle as one of its interior angles. |

26. | A polygon with four sides. |

27. | A triangle with three congruent sides. |

28. | On the most basic level, this term refers to the measurements describing the size of an object. |

29. | The distance around the the outside of a circle. |

30. | Perfectly flat and level. |

33. | Two distinct coplanar lines that do not intersect. |

38. | A parallelogram with four congruent sides. |

40. | The side of a right triangle opposite the right angle. |

41. | A polygon with nine sides. |

42. | A flat surface extending in all directions. |

43. | The point halfway between two given points. |

44. | An angle that has measure less than 90°. |

45. | Another word for average. |

46. | The bottom of a figure. |

47. | Next to; neighboring. |

48. | On the coordinate plane, the point (0, 0). |

49. | An expression used to calculate a desired result. |