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# T3ny's Stack

### Unit:2 Vocabulary

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

Acute Angle | - an angle whose measure is greater than 0 but less than 90 degrees |

Congruent angles | - two angles where one is the image of the other under a reflection or composite of reflections; written AB |

Coplanar | - within the same plane |

Midpoint | - the point M of where AM = AB |

Perpendicular Lines | - 2 segments, rays, or lines that form a 90 degree angle |

Ray | - a one-dimensional figure that consists of one endpoint A, one point B, all of the points on , and all points for which B is between them and A; written |

Space | - the set of all possible points; made up of infinite planes |

Angle | - the union of 2 rays that have the same endpoint; measured in degrees or radians (trig.); the five types of angles are zero, acute, right, obtuse, and straight |

Congruent segments | â€¢Congruent Segments have the same length. |

counter-example | -a situation in a conditional for which the antecedent is true, but the conditional is false; aka contradiction |

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

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

right angle | -measures 90 degrees |

angle bisector | An angle bisector is a ray that cuts the angle exactly in half, making two equal angles. |

conjecture | is believed to be true but not yet proved. |

inductive reasoning | is the process of arriving at a conclusion based on a set of observations. |

opposite rays | - two rays with a common endpoint that form a line |

point | - a zero-dimensional figure; while usually left undefined |

segment | the set of points consisting of two distinct points and all inbetween them; written |

collinear | - in the same line |

coordinate | - a number that identifies (or helps to identify) a point on a number line (or on a plane, or in space) |

line | - a two-dimensional object that has no endpoints |

parallel lines | Two lines in the same plane which never intersect are called parallel lines |

postulate | - a statement assumed to be true without proof |

skew line | - non-coplanar lines that don't intersect |

Created by:
paz_y_amor