利用镜子测量高大物体的相似三角形

GeoGebra 命令及参数

1. Line(B, Base) → a
2. Point(a) → Mirror
3. Point(a) → Feet
4. OrthogonalLine(Mirror, a) → b
5. OrthogonalLine(Feet, a) → c
6. Point(c) → Eyes
7. Ray(Mirror, Eyes) → d
8. Mirror(Mirror, b) → Mirror'
9. Mirror(Eyes, b) → Eyes'
10. Ray(Mirror', Eyes') → d'
11. Segment(Eyes, Feet) → e
12. Segment(Feet, Mirror) → f
13. Segment(Mirror, Base) → g