Mandart椭圆与圆的几何构造

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → O
2. Circle(O, 1) → c
3. Point(c) → A
4. Point(c) → B
5. Point(c) → C
6. Line(B, C) → f
7. Line(C, A) → g
8. Line(A, B) → h
9. TriangleCenter(A, B, C, 8) → X_8
10. TriangleCenter(A, B, C, 4) → H
11. TriangleCenter(A, B, C, 9) → X_9
12. TriangleCenter(A, B, C, 11) → X_{11}
13. Line(B, X_8) → i
14. Line(C, X_8) → j
15. Line(A, X_8) → k
16. Intersect(h, j) → D
17. Intersect(f, k) → E
18. Intersect(g, i) → F
19. Mirror(D, X_9) → D'
20. Conic(D, E, F, X_{11}, D') → d
21. Circle(D, E, F) → e
22. TriangleCenter(A, B, C, 1158) → X_{1158}
23. TriangleCenter(A, B, C, 1364) → X_{1364}
24. TriangleCenter(A, B, C, 1) → G
25. Circle(G, X_{11}) → p
26. Segment(B, C) → l
27. Segment(C, A) → m
28. Segment(A, B) → n
29. Sequence(TriangleCenter[A, B, C, nb], nb, 2, 500) → l1