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Circumference

Pi times the diameter or the distance around the circle.

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.

Circumference

This concept teaches students how to calculate the circumference of a circle.
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Circumference

This concept teaches students how to calculate the circumference of a circle.
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Solving problems of circles

This concept teaches students how to calculate the circumference of a circle.
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• PLIX

Circumference: Ancient Stonehenge Math Mysteries

Circumference Interactive
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• PLIX

Decode the Circumference Formula

Circumference Interactive
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• PLIX

Definition of Pi

Circumference Interactive
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• PLIX

Circling a Circle

Circumference Interactive
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• Video

Circumference Principles

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

Circumference Examples

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

Circumference Discussion Questions

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

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• Real World Application

Getting in Gear!

Discover how gears work and how circumferences come into play.
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• Study Guide