An angle is a shape formed by two lines that share the same endpoint, called the vertex of an angle.
Angles provide a way to express the difference in gradient between two lines that meet at an angle without having to define the gradient of both.
Angles can be divided into 3 types:
Right Angle
The right angle is at 90°.
Acute Angle
An acute angle is an angle whose value is less than 90°.
Obtuse Angle
An obtuse angle is greater than 90° but less than 180°.
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