正弦和角公式 by Chris Patterson

GeoGebra 命令及参数

1. Rotate(P, a, A) → Q
2. Angle(P, A, Q) → α
3. Rotate(Q, b, A) → R
4. Angle(Q, A, R) → β
5. Segment(A, Q) → c
6. Segment(Q, R) → d
7. Segment(A, R) → e
8. Segment(R_1, R) → f
9. Intersect(c, f) → B
10. Segment(R, C) → i
11. Angle(C, R, Q) → γ
12. Angle(R_1, B, A) → δ
13. Angle(R, B, Q) → ε
14. Segment(C, Q) → j
15. Polygon(R, C, Q) → poly1, p', p'', c_1
16. Segment(Q, Q_1) → k
17. Polygon(A, Q, Q_1) → poly2, q_1, a_1, q