# Parallelograms

## Quadrilateral with two pairs of parallel sides.

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Parallelograms

by CK-12 //at grade
This concept teaches students properties of and theorems about parallelograms and how to apply them.
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• PLIX

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Parallelograms Interactive
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• Video

## Parallelograms Principles

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This video gives more detail about the mathematical principles presented in Parallelograms.
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• Video

## Parallelograms Examples

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This video shows how to work step-by-step through one or more of the examples in Parallelograms.
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• Critical Thinking

## Parallelograms Discussion Questions

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

## A Parallelogram for the Stars

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By using binoculars and a parallelogram mount, you can see the stars.
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• Real World Application

## Parallelograms

by CK-12 //at grade
Can you identify and classify parallelograms in architecture?
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• Study Guide

## Parallelograms Study Guide

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This study guide looks at properties of parallelograms and special parallelograms (rectangle, rhombus, square), theorems about parallelograms and special parallelograms, and how to identify special parallelograms.
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