平行四边形的底和高 by GeoGebra Classroom Activities

GeoGebra 命令及参数

1. Polygon(A, B, C, D) → poly1, a, b, c, d
2. Polygon(C, E, F, D) → poly2, c_1, e, f, d_1
3. Segment((4, 0), (4, t)) → g
4. Segment(D, C) → h
5. Vector((0, 0), (t - 7, 0)) → u
6. Translate(A, u) → A'
7. Translate(B, u) → B'
8. Translate(C, u) → C'
9. Translate(D, u) → D'
10. Polygon(A', B', C', D') → poly1', a', b', c', d'