三维向量与等边三角形对称性演示
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①本范例通过 GeoGebra 演示三维空间中向量、等边三角形及其对称性的关系;②涉及核心数学概念包括三维向量、等边三角形构造、对称性分析、三角函数应用;③作图要点运用了 Point, Element, Intersect, Circle, Segment, Angle, OrthogonalLine, CircleArc, Vector 等命令与对象进行精确几何构造与动态演示;④适合高中及以上数学学习者,用于理解空间几何、向量运算及对称性原理。
GeoGebra 命令及参数
Point(yAxis) → EElement(fnl, function) → gIntersect(xAxis, yAxis) → ACircle(A, B) → cSegment(A, C) → aSegment(B, A) → bAngle(B, A, C) → αOrthogonalLine(C, yAxis) → dIntersect(d, yAxis) → DCircleArc(A, B, C) → eVector(C, D) → uVector(E, F) → vSegment(D, A) → hSegment(H, B) → iVector(t, C) → wOrthogonalLine(C, b) → jIntersect(j, i) → IVector(C, I) → zVector(I, J) → kVector(E, K) → lVector(L, K) → nSegment(S, U) → b_1Segment(P, Q) → c_1Segment(R, T) → a_1Vector(M, V) → pVector(C_1, W) → v_1Segment(V, A) → g_1Vector(L, A_1) → mElement(fnnl, function) → fnnVector(C_1, W) → u_1Vector(V, Z) → z_1Vector(C, W) → h_1Vector(V, Z) → j_1Segment(A, V) → k_1CircleArc(A, V, H) → p_1Segment((0, π), L) → rSegment((-1.5, π), M) → qVector(V, (x(V), 0)) → w_1Vector(E_1, C_1) → z_2Vector(I, F_1) → l_1Vector(F_1, G_1) → m_1Vector(C, G_1) → i_1