随机梯形/平行四边形/三角形/圆

GeoGebra 命令及参数

1. Rotate(B, α, A) → B'
2. Rotate(C, α, A) → C'
3. Rotate(D, α, A) → D'
4. Rotate(E, α, A) → E'
5. Segment(C', D') → c
6. Segment(B', E') → d
7. Vector(B', C') → u
8. Vector(C', B') → v
9. Point(Segment[G, K], random()) → J
10. Random(1, 4) → type
11. Segment(J, L) → e
12. Polygon(L, H, J) → poly1, j, l, h
13. Polygon(H, J, L, I) → poly2, h_1, j_1, l_1, i
14. Polygon(J, M, I, H) → poly3, j_2, m, i_1, h_2
15. Segment(M, I) → f
16. Segment(J, H) → g
17. Segment(I, H) → k
18. Segment(M, J) → n
19. Segment(I, H) → p
20. Segment(L, J) → q
21. Segment(L, I) → r_1
22. Segment(J, H) → s
23. Segment(L, H) → t
24. Segment(H, J) → a_1
25. Segment(J, L) → b_1
26. Text(Distance[B', C'] - 0.08 + "", Midpoint[B', C']) → text1
27. Circle(A, 2 + (random() * 3)) → c_1
28. Rotate(A + (Radius[c_1], 0), Random[0, 359]°, A) → O
29. Segment(A, O) → r