Assertion: slope | /r/HasProperty | equal
Facets:
Source sentences:
text: When the slope of a line can not be measured in the conventional way, we can use the angle of inclination because the angle of inclination and the slope of the line are actually equal.
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.