Across |

6. | the side of an isoscoles triangle whose endpoints are the vertices of the base angles |

8. | exterior angles on alternate sides of the transversal (not on the same parallel line) |

9. | an arc whose endpoints form an angle over 180 degrees with the center of the circle; written major arc ADB - the extra letter is used to distinguish it from a minor arc; see minor arc |

10. | two or more coplanar lines that have no points in common or are identical (eg, the same line) |

11. | arrangement of pixels |

14. | written π ; the ratio C/D where C is the circumference and D is the diameter of a circle; 3.14159265359 |

15. | a parallelogram with four equilateral sides |

17. | the area of the lateral surface of a solid |

18. | the set that satisfies a given condition |

20. | a form of conditional; if not p, then not q; written ~p implies ~q |

21. | 2 nonstraight and nonzero angles that have a common side in the interior of the angle formed by the noncommon sides |

25. | a polygonal region of a surface |

27. | equilateral, equal, exactly the same (size, shape, etc.) |

28. | a zero-dimensional figure; while usually left undefined, has four main representions - the dot, the node, the location, and the ordered pair of numbers |

30. | angles between two lines cut by a transversal; see exterior angles |

32. | the set of points on a plane at a certain distance (radius) from a certain point (center); a polygon with infinite sides |

33. | the measure of the tilt of a line; rise over run (i.e., how much the line moves up for every movement to the right). |

34. | a quadrilateral that has two distinct pairs of consecutive equilateral sides |

36. | a quotient of 2 numbers |

38. | a reversed conditional; if a conditional is p implies q, than its converse is q implies p |

39. | non-coplanar lines that don't intersect |

40. | an angle whose measure is greater than 90 but less than 180 degrees; see acute angle |

41. | a two-dimensional group of points that goes on infinitely in all directions; made up of infinite lines |

43. | the line containing the vertex of a conic solid and the center of the base |

44. | the surface of a conic solid whose base is a circle; see right cone |

46. | a figure is concave if a line segment can be drawn so that it goes in, out, then back into the figure. |

49. | the surface of a cylindric solid whose base is a circle; |

50. | a tesselation of congruent squares sometimes used to measure distance |

51. | 2 supplementary adjacent angles whose noncommon sides form a line |

52. | the segment whose endpoints are any point on a circle or sphere and its center; the length of that segment |