An altitude of a triangle is:

  1. the longest side
  2. a bisector of an angle
  3. a perpendicular from a vertex to the opposite side (or its extension)
  4. a line from a vertex to the midpoint of the opposite side
Answer

C) a perpendicular from a vertex to the opposite side (or its extension)

Altitudes measure the heights of the triangle. SLO M-09-B-31 · Understanding

Mathematics MCQ · More Construction of Triangles MCQs · Practise