Reference Terms
from Wikipedia, the free encyclopedia

Angle

An angle is the figure formed by two rays sharing a common endpoint, called the vertex of the angle.

Angles provide a means of expressing the difference in slope between two rays meeting at a vertex without the need to explicitly define the slopes of the two rays.

Angles are studied in geometry and trigonometry.

Note:   The above text is excerpted from the Wikipedia article "Angle", which has been released under the GNU Free Documentation License.
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September 3, 2015

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