Assertion: curve's tangent line | /r/CapableOf | touch curve
Facets:
value: at that point
type: TEMPORAL
Source sentences:
text: The intuitive notion that a tangent line "touches" a curve can be made more explicit by considering the sequence of straight lines (secant lines) passing through two points, A and B, those that lie on the function curve.
text: In geometry, the tangent line (or simply tangent) to a plane curve at a given point is the straight line that "just touches" the curve at that point.