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Orthocenter of a Triangle by goodashl

Orthocenter of a Triangle by goodashl
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2015-12-23 08:32
TriangleCoordinate GeometryGeometric Construction
This example demonstrates the orthocenter of a triangle, which is the point where the three altitudes of a triangle intersect. Using GeoGebra commands such as Polygon, Midpoint, Line, and Intersect, the construction dynamically shows the properties of the orthocenter. Suitable for students at the junior high school level and above.

GeoGebra Commands & Parameters

  1. Polygon(A, B, C) → poly1, c, a, b
  2. Midpoint(B, C) → D
  3. Midpoint(C, A) → E
  4. Midpoint(A, B) → F
  5. Line(D, A) → d
  6. Line(F, C) → e
  7. Line(E, B) → f
  8. Intersect(d, e) → G