Lesson Plan: Medians of Triangles | Nagwa Lesson Plan: Medians of Triangles | Nagwa

Lesson Plan: Medians of Triangles Mathematics

This lesson plan includes the objectives and prerequisites of the lesson teaching students how to identify the medians of a triangle and use their properties of proportionality to find a missing length.


Students will be able to

  • understand that a median of a triangle is the line segment joining a vertex to the midpoint of the opposite side,
  • understand that the three medians all intersect at one point called the point of concurrence,
  • understand that the point of intersection of the medians divides each median in the ratio 12 from the base,
  • use the ratio of the lengths of the medians on either side of the point of intersection to find missing lengths in a triangle,
  • understand that, in a right triangle, the median from the vertex at the right angle to the hypotenuse is half the length of the hypotenuse and vice versa,
  • understand that, in a 30-60-90 triangle, the length of the side opposite the 30 angle is half the length of the hypotenuse,
  • use the median in a right triangle to find missing lengths in right triangles.


Students should already be familiar with

  • the sum of the angles in a triangle,
  • equilateral triangles,
  • triangle theorems,
  • congruent triangles.

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