从正方形到五边形

GeoGebra 命令及参数

1. Polygon(A, B, 4) → poly1, b, c, d, e, C, D
2. Midpoint(b) → E
3. Circle(E, C) → f
4. Line(A, B) → g
5. Intersect(f, g) → F, G
6. Segment(A, G) → h
7. OrthogonalLine(G, h) → i
8. OrthogonalLine(C, c) → j
9. Intersect(i, j) → H
10. Segment(C, H) → k
11. Segment(H, G) → a_3
12. Polygon(A, G, H, D) → poly2, a_1, g_1, h_1, d_1
13. Circle(B, h) → p
14. Circle(C, D) → q
15. Intersect(q, p) → I, J, ,
16. Segment(C, I) → m
17. Angle(B, C, I) → α
18. Rotate(C, α, I) → N
19. CircleArc(I, C, N) → r
20. Segment(I, N) → l
21. Circle(N, I) → s
22. Circle(B, C) → t
23. Intersect(s, t) → K, L, ,
24. Segment(K, N) → n
25. Segment(K, B) → b_1