三角形垂心演示 by Ngan Chiu Yeung

GeoGebra 命令及参数

1. Polygon(A, B, C) → t1, c, a, b
2. OrthogonalLine(B, b) → f
3. OrthogonalLine(A, a) → g
4. OrthogonalLine(C, c) → h
5. Angle(c, h) → α
6. Angle(a, g) → β
7. Angle(b, f) → γ
8. Intersect(g, f) → H