比例与分数

GeoGebra 命令及参数

1. Point(yAxis) → D_1
2. Intersect(xAxis, yAxis) → A_1
3. Point(xAxis) → B_1
4. Polygon(A_1, B_1, C_1, D_1) → book, a_1, b_1, c_1, d
5. PointIn(book) → P
6. Segment(B_1, M) → f
7. Segment(C_1, M) → g
8. Segment(D_1, M) → h_1
9. Point(g) → N
10. Line(N, c_1) → i
11. Line(N, b_1) → j
12. Intersect(i, h_1) → L
13. Intersect(j, f) → O
14. Segment(D_1, L) → k
15. Segment(L, N) → l
16. Segment(N, C_1) → m
17. Segment(O, B_1) → n
18. Segment(O, N) → p
19. Ray(P, G) → q
20. Dilate(F, a_2, P) → D
21. Dilate(K, b_2, P) → B
22. Line(B, i) → r
23. Line(D, j) → t
24. Intersect(r, t) → C
25. Segment(B, C) → a
26. Segment(C, D) → b
27. Intersect(a_1, b_1) → I
28. Polygon(I, F_2, G_2, K_2) → MonaLisa, i_1, f_2, g_2, k_2
29. Midpoint(f_2) → J
30. Midpoint(g_2) → P_1