分数乘法演示 by Gareth Daniels

GeoGebra 命令及参数

1. Polygon(F, E, B, A) → poly1, f, e, b_1, a_1
2. Polygon(F, D, C, A) → poly2, f_1, d_1, c_1, a_2
3. Sequence((0, i), i, 1, a - 1) → list1
4. Sequence((d, i), i, 1, a - 1) → list2
5. Sequence(Segment[Element[list1, i], Element[list2, i]], i, 1, a - 1) → list3
6. Sequence((i / c, 0), i, 1, d * c) → list4
7. Sequence((i / c, a), i, 1, d * c) → list5
8. Sequence(Segment[Element[list4, i], Element[list5, i]], i, 1, c * d) → list6
9. Segment(E, B) → g
10. Polygon(G, H, I, J) → poly3, g_1, h, i, j
11. Segment(G, H) → k
12. Segment(H, I) → l
13. Segment(I, K) → m
14. Segment(K, G) → n
15. Sequence((i, 0), i, 1, floor(b / c)) → list7
16. Sequence((i, a), i, 1, floor(b / c)) → list8
17. Sequence(Segment[Element[list7, i], Element[list8, i]], i, 1, floor(b / c)) → list9