Area of a 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.

Area of a Circle

This concept teaches students how to calculate the area of a circle.
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Area of a Circle

Learn to find areas of circles given the radius or the diameter.
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Area of Circles

Learn to calculate the area of circles and the area of sectors of circles.
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Area of a Circle

Learn how to find the area of a circle.
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Area of a Circle

Learn to find areas of circles given the radius or the diameter.
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• PLIX

Examing Circles: Area of a Circle

Area of a Circle Interactive
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• PLIX

Area of a Circle: Hula Hoop Radius

Area of a Circle Interactive
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• PLIX

Area of a Circle: Campsite

Area of a Circle Interactive
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• Video

Area of a Circle Principles

This video gives more detail about the mathematical principles presented in Area of a Circle.
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• Video

Area of a Circle Examples

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

Area of a Circle Discussion Questions

A list of student-submitted discussion questions for Area of a Circle.
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• Real World Application

Ringside Seats

Discover why sports venues are circular.
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• Study Guide