圆锥的截面 by Stephanie Bagley

GeoGebra 命令及参数

1. Intersect(yAxis, xAxis) → A
2. Point(zAxis) → F
3. Intersect(zAxis, xAxis) → E
4. Cone(E, F, 1) → TheCone, r, i
5. PointIn(i) → G
6. Point(xAxis) → I
7. Point(xAxis) → K
8. Point(zAxis) → O
9. Plane(I, K, O) → p
10. PointIn(p) → CenterOfNormalAngle
11. Line(CenterOfNormalAngle, xAxis) → g
12. Circle(CenterOfNormalAngle, 0.25, p) → c
13. Intersect(g, c) → i_{2}, i_1
14. CircleArc(CenterOfNormalAngle, i_{2}, i_1, p) → ArcForPlaneAngle
15. Point(ArcForPlaneAngle) → NormalAngleHandle
16. Segment(CenterOfNormalAngle, NormalAngleHandle) → NormalSeg
17. Point(zAxis) → B
18. Circle(CenterOfNormalAngle, 0.25, p) → d
19. Point(yAxis) → J
20. Plane(I, J, K) → q
21. OrthogonalLine(CenterOfNormalAngle, g, p) → h
22. Point(zAxis) → C
23. Cylinder(A, C, 1) → TheCylinder, e, f, b
24. OrthogonalPlane(G, NormalSeg) → PerPenPlane
25. IntersectPath(PerPenPlane, TheCone) → k