Intersection of 3 Medians

Intersection of 3 Medians
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2016-09-01 09:44
This example demonstrates the intersection point of the three medians of a triangle. Key mathematical concepts include the medians and centroid of a triangle. Using GeoGebra commands such as Polygon, Point, OrthogonalLine, Distance, and Intersect, the three medians of a triangle can be constructed and their intersection point found. Suitable for middle school and above students to learn triangle geometry.

GeoGebra Commands & Parameters

  1. Polygon(A, B, C) → poly1, c, a, b
  2. Point(c) → D
  3. OrthogonalLine(D, c) → f
  4. Point(b) → E
  5. OrthogonalLine(E, b) → g
  6. Point(a) → F
  7. OrthogonalLine(F, a) → h
  8. Distance(D, B) → distanceDB
  9. Distance(D, A) → distanceDA
  10. Distance(A, E) → distanceAE
  11. Distance(E, C) → distanceEC
  12. Distance(C, F) → distanceCF
  13. Distance(F, B) → distanceFB
  14. Intersect(f, g) → G
  15. Circle(G, A) → d

AI Drawing Prompt Reference

Draw a triangle. On each side, pick a point. Construct a line perpendicular to each side through its chosen point. These three perpendicular lines intersect at a single point, which is the centroid of the triangle. Then draw a circle centered at this centroid passing through one vertex of the triangle. Also measure and display the distances from the centroid to each side-point, and from each side-point to the adjacent vertices, to show the proportional division of the medians.
The prompt above was compiled from the original drawing commands and is for reference only.