Lesson Plan


An interesting property about area and an arbitrary point on a triangles interior is explored in this activity


  • Mathematics > General
  • Mathematics > Calculus
  • Mathematics > Geometry
  • Mathematics > Graphing
  • Mathematics > Patterns
  • Mathematics > Trigonometry

Education Levels:

  • Grade 9
  • Grade 10
  • Grade 11
  • Grade 12


geometry measurement coordinate conjecture pythagorean theorum trapezoid



Access Privileges:

Public - Available to anyone

License Deed:

Creative Commons Attribution 3.0


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Curriki Rating
On a scale of 0 to 3
On a scale of 0 to 3

This resource was reviewed using the Curriki Review rubric and received an overall Curriki Review System rating of 1, as of 2014-08-30.

Component Ratings:

Technical Completeness: 1
Content Accuracy: 2
Appropriate Pedagogy: 1

Reviewer Comments:

This activity challenges students to investigate the sum of the lengths of line segments drawn from a point inside an equilateral triangle to the midpoint of the sides. A hint to consider the area is provided. A solution is also given. As the area of a triangle is 1/2 the base times the height, it appears the document did not appropriately display the 1/2. The lesson also includes some spelling errors and is limited to the one problem.
Eleanore Livesey
September 3, 2013

I believe that the line in the formulas should be changed to 1/2

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