棱柱的体积 by brendan howden

GeoGebra 命令及参数

1. Vector(((0.75 * width), (0.5 * width))) → w
2. Vector((0, height)) → z
3. Vector(((-0.75 * length), (0.4 * length))) → u
4. Line(C, z) → d
5. Line(B, w) → e
6. Line(B, u) → f
7. Line(A, z) → g
8. Intersect(f, g) → D
9. Intersect(d, e) → E
10. Segment(A, D) → h
11. Segment(D, B) → i
12. Segment(B, E) → j
13. Segment(E, C) → k
14. Line(D, j) → l
15. Line(E, i) → m
16. Intersect(l, m) → F
17. Segment(D, F) → n
18. Segment(F, E) → p
19. Polygon(D, A, O, B) → poly1, d_1, a_1, o, b_1
20. Polygon(D, F, E, B) → poly2, d_2, f_1, e_1, b_2
21. Polygon(O, C, E, B) → poly3, o_1, c_1, e_2, b_3
22. Midpoint(o_1) → G
23. Midpoint(c_1) → H
24. Midpoint(a_1) → I