相似变换构造

GeoGebra 命令及参数

1. Polygon(A, B, C) → t1, c, a, b
2. Line(D, B) → f
3. Line(D, A) → g
4. Line(D, C) → h
5. Dilate(A, 2, D) → A'
6. Dilate(B, 2, D) → B'
7. Dilate(C, 2, D) → C'
8. Polygon(A', B', C') → t1', c', a', b'
9. Dilate(A, 4, D) → A'_1
10. Dilate(B, 4, D) → B'_1
11. Dilate(C, 4, D) → C'_1
12. Polygon(A'_1, B'_1, C'_1) → t1'_1, c'_1, a'_1, b'_1
13. Distance(a'_1, c'_1) → d
14. Distance(A, a) → distanceAa
15. PointIn(t1'_1) → Pointt1'1
16. PointIn(t1') → Pointt1'
17. PointIn(t1) → Pointt1