平行四边形的面积 by Edward Knote

GeoGebra 命令及参数

1. Point(Circle[A, Base]) → B
2. Segment(A, B) → c
3. Point(Circle[A, Height]) → C
4. Segment(A, C) → d
5. Circle(A, C) → e
6. OrthogonalLine(A, c) → f
7. OrthogonalLine(B, c) → g
8. Intersect(e, f, 1) → D
9. Line(D, c) → h
10. Intersect(g, h) → E
11. Segment(D, E) → i
12. Point(i) → F
13. Segment(A, F) → j
14. Line(B, j) → k
15. Intersect(h, k) → G
16. Polygon(A, F, G, B) → P, a_1, f_1, g_1, b_1
17. OrthogonalLine(F, b_1) → l
18. Intersect(b_1, l) → H
19. Polygon(A, H, F) → Q, f_2, a_2, h_1
20. Polygon(H, B, G, F) → R, h_2, b_2, g_2, f_3
21. Vector(A, B) → u
22. Translate(A, Vector[m * u]) → A'
23. Translate(H, Vector[m * u]) → H'
24. Translate(F, Vector[m * u]) → F'
25. Polygon(A', H', F') → Q', f', a', h'
26. Midpoint(F, H) → J
27. Midpoint(A, H') → I
28. Segment(F, H) → a
29. Segment(A, H) → b