线外一点

GeoGebra 命令及参数

1. PointIn(xy) → A
2. PointIn(xy) → B
3. Point(Line[A, A + v]) → C
4. Point(Line[B, B + v]) → D
5. Segment(A, C) → seg1
6. Segment(B, D) → seg2
7. Dots(A, C) → dotsA
8. Dots(B, D) → dotsB
9. Line(C, A) → line
10. Line(A, B) → line2
11. Intersect(line, xy) → E
12. Segment(A, B) → segAB
13. Segment(C, F) → segCF
14. Midpoint(G, D) → H
15. Line(H, H + v) → line3
16. Circle(line3, D) → c
17. Point(c) → I
18. Plane(D, I, D + v) → p2
19. PointIn(xy) → J
20. Point(Ray[J, J + v]) → K
21. Segment(J, K) → segJK
22. Point(segJK) → L
23. AffineRatio(J, K, L) → ratio
24. Vector(L, L + (v * 2 / 3)) → u
25. Vector(L, L - (v * 2 / 3)) → w
26. Segment(G, I) → segGI
27. Segment(I, D) → segID
28. Segment(A, M) → segAM
29. Segment(M, B) → segMB
30. Segment(I, M) → segIM
31. Segment(G, D) → segGD
32. Angle(G, I, D) → ang1
33. Angle(A, M, B) → ang2
34. Line(B, D) → lineBD
35. QuadricSide(Cylinder[N, H, Radius[c]]) → cyl