Assertion: curve's tangent line | /r/CapableOf | go in same direction
Facets:
value: as the curve
type: OTHER
Source sentences:
text: As it passes through the point where the tangent line and the curve meet, called the point of tangency, the tangent line is "going in the same direction" as the curve, and is thus the best straight-line approximation to the curve at that point.