帆船 1：探索周期函数的直观理解

GeoGebra 命令及参数

1. Circle(A, B) → c
2. Point(c) → C
3. Segment(D, C) → g
4. Segment(C, A) → h
5. Polygon(E, F, G, H) → poly1, e, f_1, g_1, h_1
6. Point(g_1) → I
7. Polygon(I, J, K, L) → poly2, i, j, k, l
8. Intersect(g_1, yAxis) → M
9. Point(g_1) → P
10. Polygon(M, N, O, P) → poly3, m, n, o, p
11. Polygon(T, S, Q, R) → poly4, t, s, q, r
12. Polygon(U, W, Z, A_1, V) → poly5, b, d, i_1, j_1, k_1
13. Circle(B_1, C_1) → c_1
14. Circle(B_1, D_1) → d_1