正方形面积计算与向量构造

GeoGebra 命令及参数

1. Polygon(A, B, 4) → poly1, a, b, c, d, C, D
2. LineBisector(d) → e
3. LineBisector(c) → f
4. Intersect(e, f) → E
5. Polygon(A, E, B) → poly2, b_1, a_1, e_1
6. Segment(E, D) → g
7. Segment(E, C) → h
8. Angle(C, E, D) → α
9. Angle(A, E, B) → β
10. Vector(A, F) → u
11. Translate(A, u) → A'
12. Translate(E, u) → E'
13. Translate(B, u) → B'
14. Polygon(A', E', B') → poly2', b', a', e'
15. OrthogonalLine(E', e') → i
16. Intersect(i, e') → G
17. Segment(G, E') → j
18. Angle(F, E', G) → γ
19. Angle(E', G, F) → δ
20. Angle(G, F, E') → ε