菱形的性质 by Jill Casey

GeoGebra 命令及参数

1. Point(yAxis) → H
2. Intersect(xAxis, yAxis) → B
3. Point(xAxis) → O
4. Polygon(H, B, O) → t1, c, a, b
5. Mirror(H, a) → M
6. Mirror(B, a) → B'
7. Mirror(O, a) → C'
8. Polygon(M, B', C') → t1', c', a', b'
9. Mirror(H, c) → A'_1
10. Mirror(B, c) → B'_1
11. Mirror(O, c) → R
12. Polygon(A'_1, B'_1, R) → t1'_1, c'_1, a'_1, b'_1
13. Mirror(A'_1, a'_1) → D
14. Mirror(B'_1, a'_1) → E
15. Mirror(R, a'_1) → F
16. Polygon(D, E, F) → t2, f, d, e
17. Angle(H, O, B) → α
18. Angle(B, O, M) → β
19. Angle(O, M, B) → γ
20. Angle(B, B', M) → δ
21. Angle(B, M, R) → ε
22. Angle(M, R, B) → ζ
23. Angle(B, R, H) → η
24. Angle(R, H, B) → θ
25. Angle(B, H, O) → ι
26. Angle(H, B, R) → κ
27. Distance(H, R) → distanceAC'1
28. Distance(R, M) → distanceC'1A'
29. Distance(M, O) → distanceA'C
30. Distance(O, H) → distanceCA
31. Distance(B, O) → distanceBC
32. Distance(R, B) → distanceC'1B
33. Distance(B, H) → distanceBA
34. Distance(B, M) → distanceBA'