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# Geometry2011

### Study for Mid-terms

Question | Answer |
---|---|

What is a Collinear set of points? | A set of points which all lie on the same straight line. |

What is a non-collinear set of points? | A set of three or more points that do not lie on the same straight line. |

What is a Line Segment? | A set of points consisting of two points on a line, called endpoints, and all the points on the line between the endpoints. |

What are congruent segments? | Segments that have the same measure. |

What is a midpoint of a line segment? | A point on that line segment that divides the segment into two congruent segments. |

What is a Bisector of a line segment? | Any line or subset of a line that intersects the segment at its midpoint. |

What is an angle? | A set of points that is the union of two rays having the same endpoint. |

What does a ray consist of? | A point on a line and all points on one side of the point. |

What is a straight angle? | A angle that is the union of opposite rays. |

What is an acute angle? | An angle whose degree measure is greater than 0 and less than 90. |

What is a right angle? | An angle whose degree measure is 90. |

What is a obtuse angle? | An angle whose degree measure is greater than 90 and less than 180. |

What is a congruent angle? | Angles that have the same measure. |

What is a bisector of an angle? | A ray whose endpoint is the vertex of the angle, and that divides that angle into two congruent angles. |

What are perpendicular line? | Two lines that intersect to form two right angles. |

What is a scalene triangle? | A triangle with no congruent sides. |

What is a isosceles triangle? | A triangle with two congruent sides. |

What is an equilateral triangle? | A triangle that has three congruent sides. |

Created by:
xianong123