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# 10.8: Circumference

Difficulty Level: At Grade Created by: CK-12
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Practice Circumference

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### Vocabulary Language: English Spanish

chord

A line segment whose endpoints are on a circle.

Circumference

The circumference of a circle is the measure of the distance around the outside edge of 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 $\pi$) The ratio of the circumference of a circle to its diameter.

Congruent

Congruent figures are identical in size, shape and measure.

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

Regular Polygon

A regular polygon is a polygon with all sides the same length and all angles the same measure.

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Date Created:
Jul 17, 2012
Oct 06, 2016
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MAT.GEO.820.L.2