内心点可视化

GeoGebra 命令及参数

1. Segment(A, B) → f
2. Segment(B, C) → g
3. Segment(A, C) → h
4. AngularBisector(B, A, C) → i
5. AngularBisector(C, B, A) → j
6. AngularBisector(A, C, B) → k
7. Intersect(k, i) → I
8. Intersect(j, k) → E
9. Intersect(j, k) → F
10. OrthogonalLine(I, g) → l
11. OrthogonalLine(I, h) → m
12. OrthogonalLine(I, f) → n
13. Intersect(l, m) → I_{1}
14. Intersect(m, n) → J
15. Intersect(n, f) → G
16. Intersect(h, m) → H
17. Intersect(l, g) → K
18. Distance(I, K) → distanceDK
19. Distance(I, H) → distanceDH
20. Distance(I, G) → distanceDG
21. Circle(I, K) → c
22. Tangent(f, c) → p, q
23. Tangent(h, c) → r, s
24. Tangent(g, c) → t, a
25. Polygon(B, C, A) → t1, a_1, b, c_1