正方形与筝形的构造

GeoGebra 命令及参数

1. Segment(A, B) → a
2. OrthogonalLine(A, a) → b
3. Circle(A, B) → c
4. Intersect(c, b, 2) → C
5. Line(C, a) → d
6. Line(B, a) → e
7. Line(B, b) → f
8. Intersect(d, f) → D
9. Segment(D, C) → g
10. Segment(C, A) → h
11. Segment(A, B) → i
12. Segment(B, D) → j
13. Angle(B, A, C) → α
14. Angle(D, B, A) → β
15. Angle(A, C, D) → γ
16. Angle(C, D, B) → δ
17. Distance(C, D) → distanceCD
18. Distance(D, B) → distanceDB
19. Distance(B, A) → distanceBA
20. Distance(A, C) → distanceAC
21. Segment(E, F) → k
22. Point(k) → G
23. OrthogonalLine(G, k) → l
24. Circle(G, H) → p
25. Intersect(p, l, 2) → I
26. Intersect(p, l, 1) → J
27. Segment(I, E) → m
28. Segment(E, J) → n
29. Segment(I, F) → q
30. Segment(J, F) → r