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# Circle Circumference

## C = πd; C = 2πr

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.

## Circle Circumference

Learn to find the circumference of circles given the radius or diameter.
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## Circle Circumference

Find the circumference of a circle given the radius or the diameter. EngageNY has been used for a portion of this content.
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## Circle Circumference

Find the circumference of a circle given its diameter or radius.
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## Circle Circumference

Learn to find the circumference of a circle given the diameter.
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• PLIX

## Circle Circumference

Circle Circumference Interactive
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• PLIX

## Circle Circumference: Fountain

Circle Circumference Interactive
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• Video

## Circumference of a Circle

by CK-12 //basic
Learn how to find the circumference of a circle.
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• Video

## Determine the Circumference of a Circle

by CK-12 //basic
Provides two examples of determining the circumference of a circle. One example looks at when the length of the diameter is given, and the other looks at when the length of the radius is given.
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• Video

## Circumference - Overview

by CK-12 //basic
Overview
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• Video

## Circumference - Example 1

by CK-12 //basic
Find the circumference given radius or diameter
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• Video

## Circumference - Example 2

by CK-12 //basic
Find radius or diameter given circumference
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• Video

## Circumference - Example 3

by CK-12 //basic
Perimeter of circular shapes
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• Real World Application

## Greek Theater

Find out what circles have to do with ancient Greek theater.
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## The Circle

by Kyle Bardman //basic
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• Flashcards

## Circle Circumference

by Ellaine Chou //basic
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• Flashcards

## Calculating Circles' Measurements

by Galaxy Portillo //basic