angle
Two noncollinear rays with a common end point
An angle is a geometric figure that is formed by two rays that share a common endpoint, or vertex. The rays that create an angle are called the arms of the angle, and the point where they intersect is the vertex of the angle.
Angles are measured in degrees or radians. A degree is a unit of angular measurement, where there are 360 degrees in a circle. A radian is a unit of measurement where there are approximately 6.28 radians in a circle.
There are different types of angles based on their measure. An acute angle is an angle measuring between 0 to 90 degrees. An obtuse angle measures between 90 to 180 degrees. A right angle measures exactly 90 degrees. A straight angle measures exactly 180 degrees, and a full angle measures exactly 360 degrees.
Angles are used in a variety of ways in math and other fields. They are used in geometry to solve problems related to shapes and triangles, in trigonometry to study triangles and the relationships between their sides and angles, and in physics to measure rates of rotation and other quantities that involve angles.
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