缩放变换探索

GeoGebra 命令及参数

1. OrthogonalLine(A, yAxis) → l
2. Point(l) → B
3. Polygon(A, B, 4) → poly1, a, b, c, d, C, D
4. Random(1, 10) → A2
5. Random(1, 10) → A1
6. Line(D, C) → e
7. LineBisector(c) → f
8. Intersect(e, f) → H
9. Circle(H, G) → g
10. Intersect(g, f, 1) → I
11. Polygon(A, B, C, G, I, F, D) → poly2, a_1, b_1, c_1, g_1, i, f_1, d_1
12. Segment(D, C) → h
13. Dilate(A, A3, E) → A'
14. Dilate(B, A3, E) → B'
15. Dilate(C, A3, E) → C'
16. Dilate(G, A3, E) → G'
17. Dilate(I, A3, E) → I'
18. Dilate(F, A3, E) → F'
19. Dilate(D, A3, E) → D'
20. Polygon(A', B', C', G', I', F', D') → poly2', a', b', c', g', i', f', d'
21. Segment(D', C') → j
22. Midpoint(j) → J