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Reflection Across the x-axis

Reflection Across the x-axis
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2016-12-01 07:08
VectorCoordinate GeometryTransformation
In collections UNSW MATH1131/1231 Algebra material
This example demonstrates how to reflect a point across the x-axis using GeoGebra. Key mathematical concepts include reflection transformation. The construction uses commands like Intersect, Vector, Segment, and Angle. Suitable for middle school and above students learning geometric transformations.

GeoGebra Commands & Parameters

  1. Intersect(xAxis, yAxis) → B
  2. Vector(B, C) → u
  3. Vector(B, C') → u'
  4. Segment(C', D) → c
  5. Segment(C, D) → d
  6. Angle(C, D, B) → α
  7. Angle(B, D, C) → β