二维向量与多边形构造

GeoGebra 命令及参数

1. Polygon(A, B, C) → triangle1, c, a, b
2. Polygon(D, E, F) → triangle2, f, d, e
3. Polygon(G, H, I) → triangle3, i, g, h
4. Midpoint(i) → J
5. Midpoint(b) → K
6. Midpoint(f) → L
7. Segment(J, I) → j
8. Segment(K, B) → k
9. Segment(L, F) → l
10. Area(G, J, I) → triangle1GJI
11. Area(J, H, I) → triangle1JHI
12. Area(B, A, K) → triangle2BAK
13. Area(B, K, C) → triangle2BKC
14. Area(F, D, L) → triangle3FDL
15. Area(F, L, E) → triangle3FLE