Across |

2. | any unbroken part of the circumference of a circle or other curved line |

4. | an arc of a circle having measures less than or equal to (radians) |

7. | the radian measure of a central angle of a circle is defined as a ratio of the length of the arc the angle subtends |

8. | a four-sided polygon with four angles |

9. | at equal distances |

10. | the line segment connecting two points on a circle's circumference is a chord |

12. | endpoints both lie on the circle |

14. | a segment with one endpoint on a circle, one endpoint outside the circle, and one point between these points that intersects the circle |

15. | the ratio of the hypotenuse to the shorter side adjacent to an acute angle in a right triangle |

17. | in a circle is a polygon, vertices of which are placed on a circumference |

18. | whose endpoints are the points of tangency and the fixed point outside the circle are equal |

20. | the segment of a circle is the region bounded by a chord and the arc subtended by the chord |

21. | a plane curve at a given point is the straight line that "just touches" the curve at the point |

23. | a circle which passes through all the vertices of the polygon |

25. | the relationship between two lines which meet at a right angle |

26. | an area or portion that is distinct from the others |

27. | the amount of 3-dimensional space an object occupies |

28. | the length of a line segment from its center to its perimeter |

29. | the segment contained by a secant segment with an endpoint on the circle and at the fixed point outside the circle whose points all lie outside the circle |

30. | a central angle is an angle whose apex is the center O of a circle and whose sides are radii intersecting the circle in two distinct points |

31. | any straight line segment that passes through the center of the circle and whose endpoints lie on the circle |