Assertion: curvature's curvature | /r/HasProperty | reciprocal of the radius of the circle
Facets:
value: for other curves
type: OTHER
value: for straight lines
type: PURPOSE
Source sentences:
text: At every point on a circle, the curvature is the reciprocal of the radius; for other curves (and straight lines, which can be regarded as circles of infinite radius), the curvature is the reciprocal of the radius of the circle that most closely conforms to the curve at the given point (see figure).