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Similar Triangles - SSS

Similar Triangles - SSS
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2017-04-18 08:59
TriangleAngleGeometric Construction
In collections Similar Triangles Review
This example demonstrates the SSS criterion for triangle similarity. It involves core concepts like triangle similarity, angle equality, and side proportionality. Construction uses commands such as Polygon, AngularBisector, Intersect, Angle, Circle, Segment, Point, Rotate, OrthogonalLine, Midpoint, Line, and Textfield. Suitable for high school mathematics teaching and understanding triangle similarity criteria.

GeoGebra Commands & Parameters

  1. Polygon(A, B, D) → poly1, c, a, b
  2. AngularBisector(c, b) → f, g
  3. AngularBisector(c, a) → d, e
  4. Intersect(e, g) → E
  5. Angle(A, B, D) → α
  6. Angle(B, A, D) → β
  7. Angle(B, D, A) → γ
  8. Circle(A', Segment[A', B']) → h
  9. Circle(D', Segment[D', B']) → k
  10. Intersect(h, k, 2) → F
  11. Polygon(B', A', F, D') → poly2, b', a', f_1, d'
  12. Segment(A', D') → i
  13. Circle(A', 3) → p
  14. Point(p) → G
  15. Segment(G, A') → j
  16. Angle(D', A', G) → Θ
  17. Rotate(B', Θ - 180°, A') → B''
  18. Rotate(A', Θ - 180°, A') → A''
  19. Rotate(F, Θ - 180°, A') → F'
  20. Rotate(D', Θ - 180°, A') → D''
  21. Polygon(B'', A'', F', D'') → poly2', b'', a'', f', d''
  22. Polygon(B'', A', D'') → poly3, d''_1, b''_1, a'_1
  23. Polygon(A', F', D'') → poly4, d''_2, a'_2, f'_1
  24. OrthogonalLine(A', b''_1) → l
  25. Point(l) → H
  26. Segment(H, A') → m
  27. Angle(D'', A', B'') → δ
  28. Angle(A', B'', D'') → ε
  29. Angle(B'', D'', A') → ζ
  30. Midpoint(d''_1) → I
  31. Midpoint(a'_1) → J
  32. Midpoint(b''_1) → K
  33. Midpoint(d''_2) → L
  34. Midpoint(a'_2) → M
  35. Angle(A', D'', F') → θ
  36. Line(A', xAxis) → b_1
  37. Intersect(p, b_1, 1) → O
  38. Angle(F', A', D'') → ι
  39. Angle(D'', F', A') → κ
  40. Textfield(scale) → inputBox1
  41. Textfield(scale) → inputBox1_1
  42. Textfield(scale) → inputBox1_2

AI Drawing Prompt Reference

Draw two similar triangles, triangle A'B'F' and triangle A''D''F'. First, construct triangle A'B'F' using the SSS criterion with given points A', B', and D'. Then, rotate points B', A', and F' to get triangle A''D''F'. Ensure that the corresponding sides of triangles A'B'F' and A''D''F' are proportional and the corresponding angles are equal.
The prompt above was compiled from the original drawing commands and is for reference only.