# 9.17: Area of a Circle

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**Basic**Created by: CK-12Estimated14 minsto complete

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**Practice**Area of a Circle

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chord

A line segment whose endpoints are on a circle.circle

The set of all points that are the same distance away from a specific point, called the**.**

*center*circumference

The distance around a circle.diameter

A chord that passes through the center of the circle. The length of a diameter is two times the length of a radius.pi

(or ) The ratio of the circumference of a circle to its diameter.radius

The distance from the center to the outer rim of a circle.### Image Attributions

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Description

Calculate the area of a circle.

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Difficulty Level:

Basic
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Date Created:

Feb 24, 2012
Last Modified:

Aug 25, 2016
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