向量加法与减法演示 by Ramesh Prasad Badoni

GeoGebra 命令及参数

1. Dilate(D, If[0 ≤ b < 1, 1 - b, 0], H) → D''
2. Segment(D, D'') → k
3. Line(C, k) → l
4. Vector(D, C) → v
5. Line(D'', v) → m
6. Intersect(l, m) → I
7. Dilate(A, If[1 ≤ b < 2, 2 - b, 0], I) → A'''
8. Line(A, A''') → p
9. Line(B, p) → q
10. Vector(A, B) → u
11. Line(A''', u) → n
12. Intersect(n, q) → J
13. Vector(A''', J) → r
14. Rotate(r, If[2 ≤ b ≤ 3, ((b - 2) * 180°), 180°], A''') → r'
15. Point(r') → L
16. Dilate(A, If[0 ≤ a < 1, 1 - a, 0], E) → A'
17. Vector(A, A') → w
18. Line(A', u) → f
19. Line(B, w) → g
20. Intersect(f, g) → F
21. Vector(A', F) → u'
22. Dilate(D, If[1 ≤ a < 2, 2 - a, 0], F) → D'
23. Segment(D', D) → h
24. Line(D', v) → i
25. Line(C, h) → j
26. Intersect(i, j) → G
27. Vector(D', G) → c
28. Dilate(A', If[2 ≤ a < 3, 3 - a, 0], G) → A''
29. Vector(A', A'') → d
30. Vector(D'', I) → e
31. Dilate(D'', If[3 ≤ b ≤ 4, 4 - b, 0], L) → D'''
32. Vector(D'', D''') → s