平行四边形机构

GeoGebra 命令及参数

1. Circle(A, a) → f
2. Circle(A, a + b) → e
3. PointIn(e) → B
4. Circle(B, b) → g
5. Intersect(f, g, 1) → C
6. Segment(A, C) → h
7. Segment(C, B) → i
8. Segment(C, D) → j
9. Segment(D, E) → l
10. Segment(E, F) → m
11. Segment(B, E) → n
12. Segment(G, H) → p
13. Circle(I, sz) → q
14. Point(q) → J
15. Segment(J, I) → r
16. Point(q) → K
17. Segment(K, I) → s
18. Angle(J, I, K) → α
19. Textfield(a) → inputBox1
20. Textfield(b) → inputBox2
21. Textfield(d) → inputBox4
22. Textfield(t) → inputBox5