验证平行四边形对角相等及邻角互补 by Walch Education

GeoGebra 命令及参数

1. Segment(B, C) → BC
2. Line(A, BC) → lineAD
3. Segment(A, B) → AB
4. Line(C, AB) → lineCD
5. Polygon((Edge, y(Corner[1])), Corner[2], Corner[3], (Edge, y(Corner[4]))) → Mask, a, b, c, d
6. Intersect(lineCD, lineAD) → D
7. Segment(A, D) → AD
8. Segment(C, D) → CD
9. Angle(A, B, C) → ABC
10. Angle(B, C, D) → BCD
11. Angle(D, A, B) → DAB
12. Angle(C, D, A) → CDA
13. Line(A, B) → lineAB
14. Line(B, C) → lineBC
15. Angle(A1, A, A2) → Ang1
16. Angle(B, A, A2) → Ang2
17. Angle(B, A, D) → Ang4
18. Angle(A1, A, D) → Ang3
19. Angle(B1, B, C) → Ang8
20. Angle(B1, B, B2) → Ang6
21. Angle(B2, B, A) → Ang5
22. Angle(A, B, C) → Ang7
23. Angle(B, C, D) → Ang9
24. Angle(B, C, C1) → Ang10
25. Angle(C2, C, C1) → Ang12
26. Angle(C2, C, D) → Ang11
27. Angle(C, D, A) → Ang14
28. Angle(D2, D, D1) → Ang15
29. Angle(D1, D, C) → Ang16
30. Angle(D2, D, A) → Ang13
31. Angle(B, C, D) → Ang9a
32. Angle(B, A, D) → Ang4a
33. Angle(D1, D, C) → Ang16a
34. Angle(D2, D, A) → Ang13a
35. Angle(A, B, C) → Ang7a
36. Angle(B, C, C1) → Ang10a
37. Angle(C2, C, D) → Ang11a
38. Angle(C, D, A) → Ang14a