Question

A ____ of a triangle is the perpendicular segment from a vertex to the opposite side or to the line that contains the opposite side. ​

Answer 1

Altitude

Explanation:

An altitude of the triangle is the line segment from a vertex to the opposite side and perpendicular to the opposite side. The orthocenter will not always be inside the triangle. This is why the orthocenter is the point of concurrency of the lines containing the altitudes rather than just the altitudes.