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What is an angle exactly?

April 26, 2017trig

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What is an angle exactly?

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We begin this section with the definition of an angle, which will involve several terms and their definitions. An angle is a portion of the 2-dimensional plane which resides between two different directed line segments. The starting position of the angle is known as the initial side and the ending position of the angle is known as the terminal side. The point from which both of the directed line segments originate is known as the vertex of the angle. See the figure below for a visual example of an angle.