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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.

This concept teaches students to classify quadrilaterals in the coordinate plane.

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Classify different types of quadrilaterals by their angles and side lengths.

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Classifying quadrilaterals by side lengths, angle measures and diagonals.

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• PLIX

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• Video

This video gives more detail about the mathematical principles presented in Quadrilateral Classification.

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• Video

This video shows how to work step-by-step through one or more of the examples in Quadrilateral Classification.

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• Video

## Parallelograms in a Coordinate Plane

Learn about parallelograms in a coordinate plane.

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• Video

## Kites and Trapezoids

Learn to identify kites and trapezoids.

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• Practice
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• Critical Thinking

A list of student-submitted discussion questions for Quadrilateral Classification.

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To encourage students’ critical thinking about vocabulary concepts, to allow students to reflect on their knowledge of individual vocabulary words, and to increase vocabulary comprehension using the Vocabulary Self-Rate.

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To emphasize students’ understanding of key words and practice applying the definitions of the vocabulary words to examples and drawings using the Frayer Model.

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Learn new vocabulary words and help remember them by coming up with your own sentences with the new words using a Stop and Jot table.

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## Quadrilateral Classification Four Square Concept Matrix

Summarize the main idea of a reading, create visual aids, and come up with new questions using a Four Square Concept Matrix.

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Develop understanding of concepts by studying them in a relational manner. Analyze and refine the concept by summarizing the main idea, creating visual aids, and generating questions and comments using a Four Square Concept Matrix.

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## Quadrilateral Classification Four Square Concept Matrix (Math 6)

Summarize the main idea of a reading, create visual aids, and come up with new questions using a Four Square Concept Matrix.

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• Real World Application

How many quadrilaterals can you identify and classify in the world around you?

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• Real World Application

## Traveling on Trapezoids

Find out why trapezoids are sometimes used in bridges.

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• Study Guide