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GeoGebra Geometry and Calculus Example: Triangle, Circle, and Integral

GeoGebra Geometry and Calculus Example: Triangle, Circle, and Integral
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2024-01-17 23:02
TriangleCircleIntegralGeometric Construction
In collections Special Right Triangle (1): Thinking Classroom Exploration
This example demonstrates the combination of geometric construction and calculus. Key mathematical concepts include triangles, circles, integrals, and geometric transformations. Construction involves using GeoGebra commands such as Circle, Segment, OrthogonalLine, Rotate, Angle, etc. Suitable for high school students or college undergraduates to learn basic geometry and calculus.

GeoGebra Commands & Parameters

  1. Circle(B, C) → c
  2. Segment(B, C) → a
  3. OrthogonalLine(C, a) → b
  4. Rotate(C, 45°, B) → C'
  5. Angle(C, B, C') → α
  6. Ray(B, C') → d
  7. Intersect(b, d) → A
  8. Segment(A, C) → e
  9. Segment(B, A) → f
  10. Polygon(B, C, A) → poly1, a_1, b_1, c_1
  11. Line(B, C) → h
  12. Point(h) → D
  13. Point(h) → E
  14. Ray(C, E) → i
  15. Point(i) → F
  16. Ray(C, F) → j
  17. Dilate(B, If[0 < g ≤ 1, 1 - g, 0], C) → B'
  18. Segment(B, B') → k
  19. Dilate(C, If[1 < g ≤ 2, 2 - g, 0], A) → C'_1
  20. Segment(C, C'_1) → l
  21. Circle(C, (0.2 * a)) → p
  22. Intersect(p, j, 1) → G
  23. Intersect(p, e, 1) → H
  24. Intersect(p, a, 1) → I
  25. Circle(A, (0.2 * a)) → q
  26. Intersect(q, e, 1) → J
  27. Intersect(q, f, 1) → K
  28. CircleSector(C, H, I) → s
  29. Dilate(A, If[2 < g ≤ 3, 3 - g, 0], B) → A'
  30. Segment(A, A') → m
  31. CircleSector(A, K, J) → t
  32. Rotate(s, If[3.5 < g ≤ 4.5, ((-(g - 3.5)) * pi / 2), -1.5707963267948966], C) → s'
  33. Dilate(A, If[5.5 < g ≤ 6.5, 6.5 - g, 0], B) → A'_1
  34. Vector(A, A'_1) → u
  35. Translate(t, u) → t'
  36. Rotate(B, If[16 < g ≤ 17, ((-(g - 16)) * pi / 2), ((-pi)) / 2], C) → B'_1
  37. Rotate(B', If[4.5 < g ≤ 5.5, ((-(g - 4.5)) * pi / 2), -1.5707963267948966], C) → B''
  38. Segment(B'_1, B'') → k'
  39. Rotate(t', If[6.5 < g ≤ 7.5, (((-(g - 6.5)) * 5) * pi / 4), -3.92699], B) → t''
  40. Dilate(A, If[7.5 < g ≤ 8.5, 8.5 - g, 0], C) → A'_2
  41. Vector(A, A'_2) → v
  42. Translate(t, v) → t'_1
  43. Rotate(t'_1, If[8.5 < g ≤ 9.5, (((-(g - 8.5)) * 3) * pi / 4), -2.356194490192345], C) → d_1
  44. Dilate(A, If[9.5 < g ≤ 10.5, 10.5 - g, 0], C) → A'_3
  45. Vector(A, A'_3) → w
  46. Translate(t, w) → t'_2
  47. Rotate(t'_2, If[10.5 < g ≤ 11.5, ((-(g - 10.5)) * pi / 2), -1.5707963267948966], C) → e_1
  48. Angle(C, B, B'_1) → γ
  49. Angle(B, C'_1, C) → β
  50. Angle(C'_1, C, B) → δ
  51. Circle(B, (0.2 * a)) → r

AI Drawing Prompt Reference

Create a dynamic geometric figure featuring a circle centered at B passing through C, and a triangle formed by points B, C, and A. Perform a series of transformations: draw a line through C perpendicular to BC, intersect it with a ray from B to find point A; construct smaller circles centered at C and A with radius 0.2 times segment BC; find intersections of these circles with rays and triangle edges to create circular sectors; apply rotations and dilations to points B', C', and A' across multiple stages controlled by a time variable g ranging from 0 to over 17, demonstrating the dynamic construction of integral regions; finally measure the angle ∠CBC'.
The prompt above was compiled from the original drawing commands and is for reference only.