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Introduction to Reflections

Introduction to Reflections
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2016-01-05 02:01
FunctionTransformationGeometric Construction
This example demonstrates the basic concept of reflections. Through the reflection transformation in geometric transformations, students can understand the properties of reflections and their applications in geometry. The construction uses the Mirror command. Suitable for students in middle school and above learning geometric transformations.

GeoGebra Commands & Parameters

  1. Intersect(xAxis, yAxis) → A
  2. Point(yAxis) → B
  3. Line(A, B) → a
  4. Point(xAxis) → C
  5. Line(C, D) → c
  6. Polygon(E, F, G) → poly1, g, e, f
  7. Mirror(E, a) → E'
  8. Mirror(F, a) → F'
  9. Mirror(G, a) → G'
  10. Polygon(E', F', G') → poly1', g', e', f'
  11. Mirror(E, c) → E'_1
  12. Mirror(F, c) → F'_1
  13. Mirror(G, c) → G'_1
  14. Polygon(E'_1, F'_1, G'_1) → poly1'_1, g'_1, e'_1, f'_1