相似直角三角形演示

GeoGebra 命令及参数

1. Segment(D, A) → h
2. OrthogonalLine(D, h) → n
3. Point(n) → E
4. Segment(A, E) → p
5. Point(p) → C
6. Segment(A, C) → w
7. OrthogonalLine(C, h) → s
8. Intersect(s, h) → B
9. Segment(C, B) → t
10. Segment(A, B) → v
11. Segment(A, E_1) → f
12. Point(f) → C_1
13. Segment(A, C_1) → k
14. Segment(D, E) → q
15. Angle(D, A, E_1) → α
16. Segment(E_1, D) → g
17. Angle(E_1, D, A) → β
18. Angle(A, E_1, D) → γ
19. Line(C_1, g) → i
20. Intersect(i, h) → B_1
21. Segment(C_1, B_1) → j
22. Angle(C_1, B_1, A) → δ
23. Angle(A, C_1, B_1) → ε
24. Segment(C_1, B_1) → l
25. Segment(B_1, A) → m
26. Polygon(A, C_1, B_1) → t1, b_1, a_1, c
27. Polygon(A, E_1, D) → t2, d, a_2, e
28. Angle(E, D, A) → ζ
29. OrthogonalLine(B_1, h) → r
30. Angle(A, E, D) → η
31. Polygon(A, C, B) → t3, h_1, a_3, g_1
32. Polygon(A, E, D) → t4, d_1, a_4, f_1
33. Angle(C, B, A) → θ
34. Angle(A, C, B) → ι
35. Angle(D, A, E) → κ