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1. | six-sided polygon |

2. | ratio of circumference to the length of its diameter; 3.14 |

3. | eight-sided polygon |

5. | angle that measures 90 degrees |

7. | ten-sided polygon |

8. | five-sided polygon |

10. | line segment that joins two points on the circumference of a circle |

12. | number of square units needed cover a given surface |

13. | line segment that passes through the center of a circle and has endpoint on the circle |

16. | triangle with two congruent sides |

19. | angles on the outer sides of two lines intersected by a third line |

21. | straight path that extends without end in opposite directions |

23. | lines that intersect to form right angles |

24. | parallelogram with all sides congruent |

26. | triangle with three congruent sides |

27. | distance around a polygon |

28. | lines that cross at exactly one point |

29. | distance around a circle |

30. | having same shape but not necessarily the same size |

32. | line that cuts across two or more parallel lines at different points |

33. | angle whose measures greater that 90 but less than 180 degrees |

34. | lines in a plane that do not intersect |