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Exterior Angles of Triangle

Exterior Angles of Triangle
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2016-02-01 14:46
TriangleAngleGeometric Construction
In collections S2 Angles in Triangles and Polygons
This example demonstrates the exterior angles of a triangle. Key mathematical concepts include the properties of triangle exterior angles. Using GeoGebra commands such as Polygon, Ray, Point, Angle, etc., the construction of a triangle and its exterior angles is illustrated. Suitable for students at the junior high school level and above for geometric construction.

GeoGebra Commands & Parameters

  1. Polygon(B, C, A) → poly1, a, b, c
  2. Ray(A, B) → d
  3. Ray(B, C) → e
  4. Ray(C, A) → f
  5. Point(d) → D
  6. Point(e) → E
  7. Point(f) → F
  8. Angle(D, B, C) → α
  9. Angle(E, C, A) → β
  10. Angle(F, A, B) → γ
  11. Angle(B, A, C) → δ
  12. Angle(A, C, B) → ε
  13. Angle(C, B, A) → ζ