全等线段演示

GeoGebra 命令及参数

1. Segment(A, B) → a
2. Point(Circle[C, a]) → D
3. Segment(C, D) → b
4. Dilate(A, If[0 < c ≤ 1, 1 - c, 0], D) → A'
5. Vector(A, A') → u
6. Line(A, D) → d
7. Vector(A, D) → v
8. Translate(A, v) → A'_2
9. Translate(B, v) → B'_1
10. Segment(A'_2, B'_1) → a'_1
11. Angle(C, D, B'_1) → α
12. Translate(A, u) → A'_1
13. Translate(B, u) → B'
14. Segment(A'_1, B') → a'
15. Rotate(A'_1, If[1 < c ≤ 2, ((-(c - 1)) * α), (-α)], A'_1) → E
16. Rotate(B', If[1 < c ≤ 2, ((-(c - 1)) * α), (-α)], A'_1) → B''
17. Segment(E, B'') → a''
18. Circle(D, 1) → e
19. Intersect(e, a'_1, 1) → F
20. Intersect(e, b, 1) → G
21. Intersect(e, a'_1, 1) → H
22. Intersect(e, a'', 1) → I
23. CircleSector(D, I, H) → f