平行线中的正方形

GeoGebra 命令及参数

1. Point(Circle[A, 2.8284271247461903]) → B
2. Polygon(A, B, C, D, E, F) → poly1, a_1, b_1, c_1, d_1, e_1, f_1
3. Polygon(B, C, D, E) → poly2, a, b, c, d
4. Intersect(e, d) → G
5. Intersect(e, a) → H
6. Intersect(f, b) → I
7. Intersect(f, c) → J
8. Segment(G, I) → g
9. Segment(J, H) → h
10. Intersect(e, c) → H'
11. Intersect(f, a) → J'
12. Segment(H', J') → i
13. Intersect(e, b) → G'
14. Intersect(f, d) → I'
15. Segment(G', I') → j
16. Intersect(g, h) → K
17. Intersect(g, i) → L
18. Intersect(i, j) → M
19. Intersect(h, j) → N