This is the "6.3: Proving Quad." page of the "Geometry Chapter 6" guide.
Alternate Page for Screenreader Users
Skip to Page Navigation
Skip to Page Content

Geometry Chapter 6   Tags: geometry, mahlman, math  

Last Updated: Jan 19, 2011 URL: Print Guide RSS Updates

6.3: Proving Quad. Print Page


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.



Helpful Video

Math Instructor

Profile Image
Diana Mahlman
Contact Info
Mountain View High School
(480) 472-7058
Send Email

Loading  Loading...