30°-60°直角三角形边长关系

GeoGebra 命令及参数

1. Point(Circle[A, a]) → B_2
2. Segment(A, B_2) → b
3. Circle(A, B_2) → c
4. Circle(B_2, A) → d
5. Midpoint(b) → B
6. Intersect(c, d) → C, E, ,
7. Segment(C, A) → e
8. Segment(C, B) → f
9. Segment(C, B_2) → g
10. Polygon(C, B, A) → poly1, a_1, d_1, c_1
11. Polygon(C, B_2, B) → poly2, c_2, d_2, b_1
12. Angle(C, B, A) → α
13. Angle(B, A, C) → β
14. Angle(A, C, B) → γ
15. Midpoint(e) → F
16. Midpoint(f) → G
17. Segment(A, B) → h_1
18. Midpoint(h_1) → H
19. Midpoint(H, B) → I
20. Midpoint(I, H) → J
21. PolyLine(F, J, G) → i
22. Point(i) → K
23. Midpoint(F, J) → L
24. Midpoint(J, G) → M
25. Intersect(xAxis, yAxis) → O
26. Point(Circle[O, h]) → P
27. Segment(O, P) → l
28. Circle(O, P) → p
29. Circle(P, O) → q
30. Intersect(p, q, 1) → Q
31. Midpoint(l) → R
32. Segment(O, Q) → m
33. Segment(R, Q) → n
34. Segment(O, R) → r
35. Polygon(O, R, Q) → poly3, q_1, o, r_1
36. Midpoint(m) → S
37. Midpoint(l) → T
38. Midpoint(n) → U
39. Midpoint(O, R) → A_1
40. Midpoint(A_1, R) → B_1
41. Midpoint(B_1, A_1) → C_1
42. PolyLine(U, C_1, S) → s
43. Point(s) → D_1
44. Midpoint(S, C_1) → E_1
45. Midpoint(C_1, U) → V
46. Polygon(Q, O, R) → poly4, r_2, q_2, o_1
47. Angle(R, O, Q) → δ
48. Angle(O, Q, R) → ε
49. Angle(Q, R, O) → ζ