Assertion: coordinate system's angle | /r/HasProperty | measured in radian
Facets:
value: typically
type: DEGREE
Source sentences:
text: In polar coordinates, angles are measured in radians, or rads.
text: The angles are typically measured in degrees (°) or radians (rad), where 360° = 2π rad.
text: (90,\frac{\pi}{2})$ if the angle is measured in radians.