This is the "6.3: Proving Quad." page of the "Geometry Chapter 6" guide.
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Geometry Chapter 6   Tags: geometry, mahlman, math  

Last Updated: Jan 19, 2011 URL: http://libguides.mpsaz.net/content.php?pid=84547 Print Guide RSS Updates

6.3: Proving Quad. Print Page
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Theorems

Prove a Quadrilateral is a Parallelogram by one of the following

Definition: The quadrilateral has 2 pairs of parallel sides. (same slope!)

Theorem 1: The opposite sides are congruent

Theorem 2: The opposite angles are congruent

Theorem 3: The diagonals bisects each other.

Theorem 4: The consecutive angles are supplementary.

Theorem 5: One pair of sides are both parallel (same slope) and congruent.

 

 

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