正方形内的内切圆

GeoGebra 命令及参数

1. Polygon(A, B, 4) → poly1, f, g, h, i, C, D
2. LineBisector(D, A) → j
3. LineBisector(D, C) → k
4. Intersect(k, h) → F
5. Intersect(j, g) → G
6. Intersect(k, f) → H
7. Intersect(j, i) → I
8. Segment(F, H) → l
9. Segment(I, G) → m
10. Intersect(l, m) → E
11. Circle(E, G) → c
12. Segment(E, C) → n
13. Segment(E, B) → p
14. Segment(E, A) → q
15. Segment(E, D) → r
16. Intersect(c, r, 1) → J
17. Intersect(c, n, 1) → K
18. Intersect(c, p, 1) → L
19. Intersect(c, q, 1) → M
20. Polygon(J, K, L, M) → q1, j_1, k_1, l_1, m_1
21. Intersect(m, m_1) → N
22. Intersect(l, j_1) → O
23. Intersect(m, k_1) → P
24. Intersect(l, l_1) → Q
25. Circle(E, P) → d
26. Point(d) → R
27. Segment(R, D) → s
28. Segment(R, A) → a
29. Segment(R, B) → b
30. Segment(R, C) → e
31. Point(d) → S
32. Segment(E, S) → t