交点作图15

GeoGebra 命令及参数

1. Polygon(A, B, C) → poly1, c, a, b
2. Incircle(A, B, C) → d
3. Intersect(d, c, 1) → D
4. Intersect(d, a, 1) → E
5. Intersect(d, b, 1) → F
6. Semicircle(A, B) → e
7. Semicircle(B, C) → f
8. Semicircle(C, A) → g
9. Ray(inc, D) → h
10. Ray(inc, E) → i
11. Ray(inc, F) → j
12. Intersect(e, h, 1) → G
13. Intersect(f, i, 1) → H
14. Intersect(g, j, 1) → I
15. Tangent(H, f) → k,
16. Tangent(G, e) → l,
17. Tangent(I, g) → m,
18. Intersect(k, l) → J
19. Segment(J, I) → p
20. Intersect(l, m) → K
21. Segment(K, H) → q
22. Intersect(k, m) → L
23. Segment(L, G) → r
24. Intersect(q, p) → M