Degree (angle)
![One degree (shown in red) andeighty nine (shown in blue)](/Images/godic/202502/10/Degree_diagram.svg5946.png")
![A circle with an equilateral chord (red). One sixtieth of this arc is a degree. Six such chords complete the circle.](/Images/godic/202502/10/Equilateral_chord.svg5946.png")
![A chart to convert between degrees and radians](/Images/godic/202502/10/Degree-Radian_Conversion.svg5946.png")
![](/Images/godic/202502/10/SI_base_units.svg5946.png")
A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of plane angle, defined by representing a full rotation as 360 degrees.
It is not an SI unit, as the SI unit for angles is radian, but it is mentioned in the SI brochure as an accepted unit. Because a full rotation equals 2π radians, one degree is equivalent to π/180 radians.