相似三角形 by Malin Christersson

GeoGebra 命令及参数

1. Point(xAxis) → A
2. Point(xAxis) → B
3. Polygon(A, B, C) → t1, c_1, a_1, b_1
4. Point(b_1) → D
5. OrthogonalLine(D, yAxis) → f
6. Intersect(f, a_1) → E
7. Segment(A, D) → b
8. Segment(D, C) → a
9. Segment(C, E) → c
10. Segment(E, B) → d
11. Segment(A, B) → g
12. Polygon(A, E, D) → t2, d_1, a_2, e
13. Polygon(D, B, E) → t3, e_1, d_2, b_2
14. Segment(D, E) → i
15. Polygon(C, D, E) → t4, e_2, c_2, d_3