抛物线右侧构造

GeoGebra 命令及参数

1. Segment(A, B) → a_2
2. LineBisector(a_2) → n
3. Point(n) → C
4. Polygon(A, B, C) → poly1, c, a_1, b_1
5. LineBisector(a_1) → d
6. OrthogonalLine(C, n) → e
7. Intersect(d, e) → P
8. Locus(P, C) → f
9. Intersect(n, a_2) → M
10. Intersect(d, a_1) → E
11. Segment(B, P) → f_1
12. Segment(C, P) → g
13. OrthogonalLine(E, a_2) → a
14. Line(A, B) → b_2
15. Intersect(a, b_2) → F
16. Angle(B, M, C) → α
17. Point(d) → G
18. Angle(C, E, G) → β
19. Point(f) → H
20. Line(B, n) → b
21. Parabola(B, n) → k
22. Intersect(k, b, 2) → I
23. Intersect(k, b, 1) → J
24. Segment(I, J) → j
25. Distance(A, B) → distanceAB
26. Point(b) → D
27. Distance(B, J) → distanceBJ