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# Area of a Circle

## Pi times the radius squared.

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

by CK-12 //basic

Calculate the area of a circle.

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• Video

## Determine the Area of a Circle

by CK-12 //basic

Provides an example of how to determine the area of a circle when given the diameter.

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• Video

## Area of a Circle Principles - Basic

by CK-12 //basic

This video provides the student with a walkthrough on finding the area of a circle.

0
• Video

## Area of a Circle Examples - Basic

by CK-12 //basic

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

0
• Video

## Area of a Circle

by CK-12 //basic

Learn to calculate the area of a circle.

0
• Video

## Area of a Circle - Overview

by CK-12 //basic

Overview

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• Video

## Area of a Circle: Candy Example

by CK-12 //basic

Learn how to find the area of a circle using an example with candy.

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• Video

## Area of a Circle - Example 1

by CK-12 //basic

Find area given radius or diameter

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• Video

## Area of a Circle - Example 2

by CK-12 //basic

Area of Semi- and Quarter circle

0
• Video

## Area of a Circle - Example 3

by CK-12 //basic

Find radius or diameter given area

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## Interactive Area of a Circle

by CK-12 //basic

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

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## How Did They Come Up with the Formula for the Area of a Circle?

by CK-12 //basic

This labelled graphic helps us to understand one way of deriving the formula for the area of a circle.

0
• 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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