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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

by CK-12 //basic

Calculate a circle's circumference.

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• PLIX

## Circumference: Ancient Stonehenge Math Mysteries

by CK-12 //basic

Circumference Interactive

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• Video

## Circumference Principles - Basic

by CK-12 //basic

This video provides the student with a walkthrough on finding circumference.

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• Video

## Circumference Examples - Basic

by CK-12 //basic

This video provides the student with a walkthrough of one or more examples from the concept "Circumference".

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## Interactive Circumference of a Circle

by CK-12 //basic

In this interactive you can see how changing the size of a circle affects its radius and cirumference.

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## How Long is Pi?

by CK-12 //basic

This site lets you see up to the first million digits of pi. You can even organize the digits into groups for memorization purposes!

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• Flashcards

## Perimeter and Area of Circles and Circle Parts Flashcards

by CK-12 //basic

These flashcards help you study important terms and vocabulary from Circumference, Arc Length, Area of a Circle, and Area of Sectors and Segments.

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