Assertion: triangle's line | /r/MadeOf | opposite side
Facets:
Source sentences:
text: This line containing the opposite side is called the extended base of the altitude.
text: altitude of a triangle: the perpendicular segment from a vertex of a triangle to the line containing the opposite side.
text: An altitude of a triangle is the line segment drawn from a vertex of a triangle, perpendicular to the line containing the opposite side.