## Ways to show if a quadrilateral has two pairs of parallel sides.

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This concept teaches students how to prove that a quadrilateral is a parallelogram given the properties of parallelograms.
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## Quadrilaterals that are Parallelograms Principles

This video gives more detail about the mathematical principles presented in Quadrilaterals that are Parallelograms.
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## Quadrilaterals that are Parallelograms Examples

This video shows how to work step-by-step through one or more of the examples in Quadrilaterals that are Parallelograms.
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## Opposite Sides of a Parallelogram

Proves that a quadrilateral is a parallelogram if and only if the opposite sides are congruent.
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## Diagonals of a Parallelogram

Proves that a quadrilateral is a parallelogram if and only if its diagonals bisect each other.
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## Quadrilaterals that are Parallelograms Discussion Questions

A list of student-submitted discussion questions for Quadrilaterals that are Parallelograms.
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• Real World Application

How can squares feed the world?
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• Study Guide