圆柱的截面 by Chad Kuhns

GeoGebra 命令及参数

1. Ellipse(A, B, C) → c
2. Line(A, B) → a
3. Midpoint(A, B) → D
4. OrthogonalLine(D, a) → b
5. Intersect(c, b) → E, F
6. Intersect(c, a) → G, H
7. Distance(G, H) → major
8. Distance(E, F) → minor
9. Eccentricity(c) → d
10. Segment(I, J) → h
11. Circle(I, 3) → k
12. Point(k) → K
13. Vector(I, K) → u
14. Angle(J, I, K) → α
15. Point(f) → L
16. Distance(L, M) → i
17. Segment(L, M) → j