Changes

Degree: Most commonly used in everyday life. It is defined as 1/360 of a full circle, therefore a circle has 360 degrees.

Degree: Most commonly used in everyday life. It is defined as 1/360 of a full circle, therefore a circle has 360 degrees.

Radian: Most commonly used  in science and engineering, is the angle subtended by an arc of a circle which have the same length as the circle radius. One full circle is equal to 2(<big><math>\pi</math></big>) radians, and one radian is 180/(<big><math>\pi</math></big>) degrees.

Radian: Most commonly used  in science and engineering, is the angle subtended by an arc of a circle which have the same length as the circle radius. One full circle is equal to 2<big><math>\pi</math></big> radians, and one radian is 180/<big><math>\pi</math></big> degrees.

==Classification==

==Classification==