Angle - Research Article from World of Mathematics

This encyclopedia article consists of approximately 4 pages of information about Angle.
This section contains 1,032 words
(approx. 4 pages at 300 words per page)
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An angle is a geometric figure created by two line segments that extend from a single point or two planes which extend from a single line. The size of an angle, measured in units of degrees or radians, is related to the amount of rotation required to superimpose one of its sides on the other. First used by ancient civilizations, angles continue to be an important tool to science and industry today.

The study of angles has been known since the time of the ancient Babylonians (4,000-300 b.c.). These people used angles for measurement in many areas such as construction, commerce, and astronomy. The ancient Greeks developed the idea of an angle further and were even able to use them to calculate the circumference of the Earth and the distance to the moon.

A geometric angle is formed by two lines (rays) that intersect at a common...

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This section contains 1,032 words
(approx. 4 pages at 300 words per page)
Buy the Angle Encyclopedia Article
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Angle from Gale. ©2005-2006 Thomson Gale, a part of the Thomson Corporation. All rights reserved.
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