Geometry theorems

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Author:
mathlover1
ID:
32101
Filename:
Geometry theorems
Updated:
2010-09-12 17:09:32
Tags:
geometry theorems
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Description:
Geometry theorems...add over time. Based on Euclid's geometry.
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  1. Line Intersection Theorem:
    two different lines intersect in at most one point.
  2. Betweenness Theorem:
    If B is between A nad C, then AB + BC = AC
  3. Theorem (unnamed):
    For any three points A, B, and C, AB + BC > AC.
  4. Linear Pair Theorem:
    Vertical Angle Theorem:
    • If two angles form a linar pair, then they are supplementary.
    • If two angles are vertical angles, then they have equal measures.
  5. Perpendicular Lines and Slopes Theorem:
    Two non-vertical lines are perpendicular if and only if the product of their slopes = -1.
  6. Parallel Lines and Slopes Theorem:
    Two non-vertical lines are parallel if and only if they have the same slope.

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