三角形中的正方形 by Anthony OR 柯志明

GeoGebra 命令及参数

1. Segment(A, B) → a
2. Segment(B, C) → b
3. Segment(C, A) → c
4. Point(a) → D
5. OrthogonalLine(D, a) → d
6. Intersect(d, c) → E
7. OrthogonalLine(E, d) → e
8. Circle(E, D) → f
9. Intersect(f, e, 1) → F
10. Line(A, F) → g
11. Intersect(g, b) → R
12. OrthogonalLine(R, a) → h
13. OrthogonalLine(R, h) → i
14. Intersect(i, c) → S
15. OrthogonalLine(S, i) → j
16. Intersect(h, a) → Q
17. Intersect(j, a) → P
18. Polygon(S, R, Q, P) → poly1, h_1, g_1, i_1, j_1