相似三角形计算边长

GeoGebra 命令及参数

1. Polygon(A, B, C, D) → q1, a, b, c, d
2. Polygon(E, F, G, H) → q2, e, f, g, h
3. Polygon(I, J, K, L) → q3, i, j, k, l
4. RandomPointIn(q1) → P
5. RandomPointIn(q2) → Q
6. RandomPointIn(q3) → R
7. Polygon(P, Q, R) → t1, r, p, q
8. Midpoint(P, Q) → O
9. Midpoint(Q, R) → S
10. Midpoint(P, R) → T
11. Random(30, 270) → angle
12. Mirror(Rotate[Polygon[Dilate[P, scalefactor], Dilate[Q, scalefactor], Dilate[R, scalefactor]], angle°], x = 0) → t2
13. PointIn(t2) → U
14. PointIn(t2) → V
15. PointIn(t2) → W
16. Midpoint(U, W) → Z
17. Midpoint(W, V) → A_1
18. Midpoint(U, V) → B_1
19. Angle(R, P, Q) → α
20. Angle(V, U, W) → β
21. Angle(Q, R, P) → γ
22. Angle(U, W, V) → δ
23. Shuffle(list1) → list2
24. Element(list2, 1) → s1
25. Element(list2, 2) → s2
26. Element(list2, 3) → s3
27. Textfield(empty1) → InputBox1
28. Textfield(empty2) → InputBox2
29. Textfield(empty3) → InputBox3