三角形面积 by Hatem Dhaoui

GeoGebra 命令及参数

1. Polygon(n_2, n_3, n_4) → poly1, c, a, b
2. OrthogonalLine(n_2, a) → d
3. Intersect(a, d) → D
4. Segment(n_2, D) → e
5. Midpoint(n_3, n_2) → E
6. Midpoint(n_4, n_2) → F
7. Polygon(n_2, n_4, D) → poly2, d_1, a_1, c_1
8. Polygon(n_2, n_3, D) → poly3, d_2, a_2, b_1
9. Rotate(n_2, حرك, F) → A'
10. Rotate(n_4, حرك, F) → C'
11. Rotate(D, حرك, F) → D'
12. Polygon(A', C', D') → poly2', d', a', c'
13. Rotate(n_2, (-حرك), E) → A'_1
14. Rotate(n_3, (-حرك), E) → B'
15. Rotate(D, (-حرك), E) → D'_1
16. Polygon(A'_1, B', D'_1) → poly3', d'_1, a'_1, b'
17. Segment(n_2, n_3) → f
18. Segment(n_3, D) → g
19. Segment(D, n_4) → n_6
20. Segment(n_4, n_2) → i
21. Segment(C', D') → j
22. Segment(D', A') → k
23. Segment(A', C') → l
24. Segment(B', D'_1) → m
25. Segment(D'_1, A'_1) → n_1
26. Segment(A'_1, B') → p
27. Segment(n_2, D) → q
28. Polygon(n_2, D', n_4) → poly4, c_2, a_3, d'_2
29. Polygon(n_2, D'_1, n_3) → poly5, b_2, a_4, d'_3
30. Angle(n_4, D, n_2) → β
31. Segment(A, n) → r
32. Line(C, g) → n_7
33. Line(I, n_1) → s
34. Line(n_2, n_7) → t
35. Line(n_3, s) → e_1
36. Intersect(t, s) → M
37. Intersect(n_7, s) → N
38. Intersect(n_7, e_1) → O
39. Line(n_4, s) → f_1
40. Intersect(n_7, f_1) → P
41. Line(n_3, n_7) → g_1
42. Intersect(s, g_1) → Q
43. Vector(C, P) → u
44. Vector(C, O) → v
45. Vector(I, M) → w
46. Vector(I, Q) → z
47. Polygon(B, R, S, T) → poly6, b_3, r_1, s_1, t_1
48. Polygon(B, R, S, T) → poly7, b_4, r_2, s_2, t_2
49. Midpoint(n_2, D) → U