Angle
Two rays that start at the same point, 3 total points.
An angle is a figure formed by two rays that share a common endpoint called a vertex. The two rays are typically represented by line segments and are known as the arms or sides of the angle. Angles are typically measured in degrees or radians, and the measurement indicates the amount of rotation needed to bring one arm of the angle to the position of the other arm. Angles can be classified as acute (less than 90 degrees), right (90 degrees), obtuse (between 90 and 180 degrees), or straight (180 degrees). Angles are used in many areas of mathematics and science, including geometry, trigonometry, physics, and engineering.
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