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Orthocenter of a Triangle by Karen Campe

Orthocenter of a Triangle by Karen Campe
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2017-12-08 04:14
TriangleCoordinate GeometryGeometric Construction
In collections Concurrency
This example demonstrates the orthocenter of a triangle, which is the point where the three altitudes of a triangle intersect. Using GeoGebra commands Polygon, Line, OrthogonalLine, and Intersect, a triangle can be constructed and its orthocenter found. Suitable for middle school and above students to learn about triangle properties.

GeoGebra Commands & Parameters

  1. Polygon(A, B, C) → poly1, c, a, b
  2. Line(A, B) → f
  3. Line(A, C) → g
  4. OrthogonalLine(B, g) → h
  5. OrthogonalLine(C, f) → i
  6. Intersect(h, i) → D