三角形垂心与内切圆演示

GeoGebra 命令及参数

1. Polygon(A, B, C) → t1, c, a, b
2. OrthogonalLine(A, a) → f
3. OrthogonalLine(C, c) → g
4. OrthogonalLine(B, b) → h
5. Polygon(D, E, F) → t2, f_1, d, e
6. OrthogonalLine(D, d) → i
7. OrthogonalLine(E, e) → j
8. OrthogonalLine(F, f_1) → k
9. Polygon(G, H, I) → t3, i_1, g_1, h_1
10. OrthogonalLine(G, g_1) → l
11. OrthogonalLine(H, h_1) → m
12. OrthogonalLine(I, i_1) → n