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# 6.23: Circle Graphs to Display Data

Difficulty Level: At Grade Created by: CK-12
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### Vocabulary Language: English

$\pi$

$\pi$

$\pi$ (Pi) is the ratio of the circumference of a circle to its diameter. It is an irrational number that is approximately equal to 3.14.
Area

Area

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

Pi

$\pi$ (Pi) is the ratio of the circumference of a circle to its diameter. It is an irrational number that is approximately equal to 3.14.

The radius of a circle is the distance from the center of the circle to the edge of the circle.
Squaring

Squaring

Squaring a number is multiplying the number by itself. The exponent 2 is used to show squaring.

Oct 29, 2012

Sep 24, 2015