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Vertically Opposite Angles by Simon Job

Vertically Opposite Angles by Simon Job
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2012-01-15 09:26
AngleCoordinate GeometryGeometric Construction
This example demonstrates the properties of vertically opposite angles. Vertically opposite angles are the angles opposite each other when two lines cross. Key mathematical concepts include angle properties. GeoGebra commands used include Line, Angle, Point, etc. Suitable for middle school and above students to learn geometric construction.

GeoGebra Commands & Parameters

  1. Line(A, B) → a_1
  2. Line(C, B) → b_1
  3. Angle(A, B, C) → a
  4. Point(b_1) → D
  5. Point(a_1) → E
  6. Angle(E, B, D) → b
  7. Angle(C, B, E) → d
  8. Angle(D, B, A) → c