Assertion: line | /r/HasProperty | parallel
Facets:
value: almost
type: DEGREE
value: if
type: DEGREE
Source sentences:
text: Two lines are parallel if and only if they are not the same line (coincident) and either their slopes are equal or they both are vertical and therefore both have undefined slopes.
text: Two lines lying in the same plane that do not intersect one another are said to be parallel lines.
text: If they are in the same plane there are three possibilities: if they coincide (are not distinct lines) they have an infinitude of points in common (namely all of the points on either of them); if they are distinct but have the same slope they are said to be parallel and have no points in common; otherwise they have a single point of intersection.
text: When the two lines are parallel or coincident the denominator is zero:
text: If the lines are almost parallel, then a computer solution might encounter numeric problems implementing the solution described above: the recognition of this condition might require an approximate test in a practical application.
text: So they are parallel lines.