旋转交点
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①本范例演示了通过旋转和镜像操作,观察四边形交点轨迹的动态几何现象;②涉及的核心数学概念包括交点、相似变换(Dilation)、几何变换(Transform)、解析几何(Coordinate Geometry);③作图要点提炼自构造摘要,使用了Rotate(旋转)、Mirror(镜像)、Polygon(多边形)、Segment(线段)、Intersect(交点)、Locus(轨迹)等GeoGebra命令;④适合高中及以上学生用于理解几何变换、轨迹作图及优化问题。
GeoGebra 命令及参数
Rotate(B, (2 * π / n)) → B'Mirror(B, A) → B'_1Mirror(B', A) → B''Polygon(B, B', n) → poly1, f, q, r, s, t, a, b, c, d, e, f_1, g, g_1, C, D, E, F, G, H, I, J, K, h, L, M, N, O, P, Q, R, S, T, i, j, k, l, m, pMirror(C, A) → C'Mirror(D, A) → D'Mirror(E, A) → E'Mirror(F, A) → F'Mirror(G, A) → G'Mirror(H, A) → H'Mirror(I, A) → I'Mirror(J, A) → J'Segment(B, B'_1) → h_1Segment(B', B'') → i_1Segment(C, C') → j_1Segment(D, D') → k_1Segment(E, E') → l_1Segment(F, F') → m_1Segment(G, G') → n_1Segment(H, H') → p_1Segment(I, I') → q_1Segment(J, J') → r_1Rotate(B, aa + ss) → B'_2Rotate(B'_1, aa + ss) → USegment(B'_2, U) → s_1Rotate(B', aa + ss) → B''_1Rotate(B'', aa + ss) → B'''Segment(B''_1, B''') → t_1Rotate(D, aa + ss) → D'_1Rotate(D', aa + ss) → D''Segment(D'_1, D'') → a_1Rotate(E, aa + ss) → E'_1Rotate(E', aa + ss) → E''Segment(E'_1, E'') → b_1Rotate(C, aa + ss) → C'_1Rotate(C', aa + ss) → C''Segment(C'_1, C'') → c_1Rotate(F, aa + ss) → F'_1Rotate(F', aa + ss) → F''Segment(F'_1, F'') → d_1Rotate(G, aa + ss) → G'_1Rotate(G', aa + ss) → G''Segment(G'_1, G'') → e_1Rotate(H, aa + ss) → H'_1Rotate(H', aa + ss) → H''Segment(H'_1, H'') → f_2Rotate(I, aa + ss) → I'_1Rotate(I', aa + ss) → I''Segment(I'_1, I'') → g_2Rotate(J, aa + ss) → J'_1Rotate(J', aa + ss) → J''Segment(J'_1, J'') → h_2Intersect(p_2, h_2) → VIntersect(p_2, g_2) → WIntersect(p_2, f_2) → ZIntersect(p_2, e_1) → A_1Intersect(p_2, d_1) → B_1Intersect(p_2, b_1) → C_1Intersect(p_2, a_1) → D_1Intersect(p_2, c_1) → E_1Intersect(p_2, t_1) → F_1Intersect(p_2, s_1) → G_1Locus(A_1, aa) → loc1Locus(B_1, aa) → loc2Locus(C_1, aa) → loc3Locus(D_1, aa) → loc4Locus(E_1, aa) → loc5Locus(F_1, aa) → loc6Locus(G_1, aa) → loc7Locus(V, aa) → loc8Locus(W, aa) → loc9Locus(Z, aa) → loc10Polygon(H_1, I_1, 4) → poly2, i_2, j_2, k_2, l_2, J_1, K_1
AI 绘图提示语参考
绘制一个正多边形,其顶点围绕中心点旋转生成。先构造一个多边形,然后以中心点为对称轴,将每个顶点镜像到对称位置,并连接原顶点与镜像点形成线段。接着,将整个多边形及其镜像顶点绕中心点旋转一个动态角度,生成新的旋转顶点,并连接旋转后的对应顶点形成另一组线段。最终,观察这些线段交点的轨迹,展示旋转与镜像操作下交点形成的动态几何图形。
以上提示语为根据原始绘图命令整理而来,仅供参考。