平行四边形构造与性质演示

GeoGebra 命令及参数

1. Polygon(A, B, C, D) → ABCD, a, b, c, d
2. Polygon(D, E, C) → DEC, c_1, d_1, e
3. Polygon(C, E, B) → CEB, b_1, c_2, e_1
4. Polygon(B, E, A) → BEA, a_1, b_2, e_2
5. Polygon(A, E, D) → AED, d_2, a_2, e_3
6. LaTeX(AED, true, true) → text1
7. LaTeX(BEA, true, true) → text2
8. LaTeX(CEB, true, true) → text3
9. LaTeX(DEC, true, true) → text4
10. LaTeX(Sum_1, true, true) → text5
11. LaTeX(Sum_1, true, true) → text6