圆锥体积公式与展开图互动演示（第11单元第2课）

GeoGebra 命令及参数

1. If(net < -1, (((-net) - 1) * 3), 0) → net_θ
2. If(net < -1, (3 * ((-net) - 1)) + 0.2, 0.2) → net_b
3. If(net < -1, -1, net) → net_e
4. If(net_e > -0.001, 0, (-net_e)) → net_h
5. Conic(A, B, C, D, E) → c
6. If(net > 0, 1, 0) → net_1
7. Conic(A, B, C, D, E) → d
8. Segment(V, A') → b
9. Segment(V, F') → e
10. Midpoint(A', F') → M_{A'F'}
11. Point(c) → G
12. Conic(A', B', C', F', E') → k
13. Conic(A', B', C', F', E') → p
14. Distance(O, V) → distanceOV
15. Segment(O_c, O_u) → l
16. Rotate(O_o, (θ * 2), V) → H
17. Rotate(O_o, ((-θ) * 2), V) → H'
18. CircleSector(V, H', H) → q
19. Polygon(V, A', F') → poly1, f', v, a
20. Distance(V, H') → distanceVH'
21. Segment(V, H) → b'
22. Segment(V, H') → e'
23. Intersect(p, b') → K, K_2
24. Intersect(p, e') → J, J_2
25. Segment(V, J_2) → g
26. Segment(V, K_2) → i
27. Arc(p, A', K_2) → t
28. Arc(p, J_2, F') → f
29. If(θ + (0.6 * θ_d) < (((2 * π) * r / l_s) * 0.5), θ + (0.6 * θ_d), (((2 * π) * r / l_s) * 0.5)) → θ_c
30. Rotate(O_o, θ_c, V) → H_1
31. Rotate(O_o, (-θ_c), V) → H'_1
32. CircleSector(V, H'_1, H_1) → c_2
33. Circumference(c_2) → j
34. Circumference(c) → circumferencec
35. Distance(V, H'_1) → distanceVH'1
36. Angle(H'_1, V, H_1) → α
37. Point(c_2) → I
38. CircumcircleArc(H', O_o, H) → c_1
39. CircleSector(V, H'_1, H_1) → s
40. Segment(M_{A'F'}, F') → m
41. Segment(M_{A'F'}, V) → n
42. Angle(F', M_{A'F'}, V) → β
43. Midpoint(b) → M_{VA'}
44. Textfield(r) → inputBox1
45. Textfield(h) → inputBox2