等腰三角形中的余弦关系

GeoGebra 命令及参数

1. PointIn(e) → A
2. PointIn(e) → B
3. PointIn(e) → C
4. Textfield(f) → InputBox1
5. Textfield(g) → InputBox2
6. Textfield(h) → InputBox3
7. Textfield(i) → InputBox4
8. Textfield(j) → InputBox5
9. Segment(A, B) → k
10. Midpoint(k) → D
11. Segment(A, D) → l
12. Segment(D, B) → m
13. Intersect(p, eq1) → E
14. Polygon(A, E, B) → t1, b_1, a_1, e_1
15. Angle(B, E, A) → α
16. Segment(A, E) → n
17. Segment(E, B) → q
18. If(C ≟ D, "√", "X") → text6
19. Mode(l1) → l2
20. If(c2, "√", "X") → text8
21. If(c3, "√", "X") → text9
22. If(Length[l2] ≟ 0, "No digits repeat!", "Repeated digits exist.") → text7