勾股定理三角新定理 GeoGebra 演示

GeoGebra 命令及参数

1. Circle(A, a) → c
2. Point(c) → C
3. Line(C, A) → f
4. Intersect(c, f, 2) → D
5. Point(c) → B
6. Segment(B, C) → g
7. Point(f) → E
8. Rotate(E, 90°, C) → E'
9. Point(f) → F
10. Segment(B, D) → h
11. Polygon(D, B, 3) → poly1, i, j, k, G
12. Polygon(B, C, 3) → poly2, l, m, n, H
13. Polygon(C, D, 3) → poly3, p, q, r, I
14. Angle(D, B, C) → α
15. PointIn(poly1) → Pointpoly1_1
16. PointIn(poly2) → Pointpoly2_1
17. PointIn(poly3) → Pointpoly3_1
18. Perimeter(poly1) → perimeterpoly1
19. PointIn(poly1) → Pointpoly1
20. Perimeter(poly2) → perimeterpoly2
21. PointIn(poly2) → Pointpoly2
22. Perimeter(poly3) → perimeterpoly3
23. PointIn(poly3) → Pointpoly3