使用反三角函数求直角三角形锐角

GeoGebra 命令及参数

1. Random(2, 9) → a
2. Random(2, 10) → b
3. Random(a + 1, 10) → c
4. Polygon(A, B_1, C) → t1, c_1, a_1, b_1
5. Circle(A, c) → d
6. Intersect(d, f, 1) → B
7. Polygon(A, B_1, B) → t2, d_1, a_2, b_2
8. Segment(A, B_1) → g
9. Segment(B_1, B) → h
10. Segment(B, A) → i
11. Segment(C, B_1) → j
12. Segment(C, A) → k
13. Angle(B, B_1, A) → α
14. Random(1, 2) → m
15. Angle(B_1, A, C) → β
16. Random(1, 2) → n
17. Element(L1, n) → text1
18. Element(L2, n) → text2
19. Angle(B_1, A, B) → γ
20. Textfield(δ) → InputBox1
21. Angle(A, C, B_1) → η
22. Angle(A, B, B_1) → θ