# 9.18: Radius or Diameter of a Circle Given Area

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**At Grade**Created by: CK-12
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**Practice**Radius or Diameter of a Circle Given Area

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Area

Area

Area is the space within the perimeter of a two-dimensional figure.Circle

Circle

A circle is the set of all points at a specific distance from a given point in two dimensions.Diameter

Diameter

Diameter is the measure of the distance across the center of a circle. The diameter is equal to twice the measure of the radius.### Image Attributions

## Description

Find the radius or diameter of a circle given the area of the circle

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## Date Created:

Dec 21, 2012## Last Modified:

May 09, 2015## Vocabulary

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