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SAS Exercise 1A

SAS Exercise 1A
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2016-11-30 23:16
TriangleAngleGeometric Construction
This example demonstrates how to prove triangle congruence using the SAS Theorem. Core math concepts include angles, sides, and triangle congruence criteria. Construction highlights involve commands and objects like Ray, Rotate, Angle, Point, Polygon, Segment, Circle, Intersect, CircleSector, Vector, Translate in GeoGebra. Suitable for middle school and above students learning geometric proofs.

GeoGebra Commands & Parameters

  1. Ray(A, B_1) → f
  2. Rotate(B_1, α, A) → B'
  3. Angle(B_1, A, B') → β
  4. Point(f) → B
  5. Ray(A, B') → g
  6. Point(g) → C
  7. Polygon(A, B, C) → poly1, h, i, j
  8. Segment(A, C) → k
  9. Segment(A, B) → l
  10. Circle(A, (0.2 * Min[k, l])) → c
  11. Intersect(c, f) → F,
  12. Intersect(c, k) → G,
  13. CircleSector(A, F, G) → d
  14. Point(xAxis) → H
  15. Vector((a, b)) → u
  16. Translate(A, u) → A'
  17. Translate(C, u) → D'
  18. Segment(A', D') → k'
  19. Translate(A, u) → A'_1
  20. Translate(B, u) → C'
  21. Translate(C, u) → D'_1
  22. Polygon(A'_1, C', D'_1) → poly1', d'_1, a'_1, c'
  23. Segment(D'_1, A'_1) → m
  24. Segment(C', A'_1) → n
  25. Segment(D'_1, C') → p
  26. Circle(A'_1, Radius[c]) → e
  27. Intersect(e, n, 1) → J
  28. Intersect(e, m, 1) → K
  29. CircleSector(A'_1, J, K) → q