平行四边形面积演示 by Guillermo Bautista

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A_1
2. Point(yAxis) → B_1
3. Point(xAxis) → C_1
4. CircleArc(A_1, C_1, B_1) → c
5. Point(c) → A
6. Segment(A_1, A) → a
7. Ray(A_1, C_1) → b
8. Point(b) → B
9. Line(B, a) → d
10. Line(A, b) → e
11. Intersect(e, d) → C
12. OrthogonalLine(A, b) → f
13. OrthogonalLine(C, b) → g
14. Intersect(f, b) → G
15. Intersect(g, b) → H
16. Polygon(A, G, A_1) → poly1, a_1, d_1, g_1
17. Polygon(A, G, B, C) → poly2, d_2, g_2, e_1, f_1
18. Distance(G, H) → distanceGH
19. Point(Circle[I, distanceGH]) → J
20. Segment(I, J) → h
21. Point(h) → K
22. Vector(I, K) → u
23. Translate(A, u) → D'
24. Translate(G, u) → G'
25. Translate(A_1, u) → A'
26. Polygon(D', G', A') → poly1', a', d', g'