圆锥曲线:椭圆、抛物线、双曲线
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①本范例演示了圆锥曲线(椭圆、抛物线、双曲线)的形成与性质;②涉及的核心数学概念包括圆锥曲线的定义、标准方程、几何性质以及向量与角度的应用;③作图要点——从『构造摘要』中提炼出使用了Circle(圆)、Point(点)、LineBisector(角平分线)等GeoGebra命令与对象;④适合高中数学学生及需要直观理解圆锥曲线几何本质的教学或学习用途。
GeoGebra 命令及参数
Circle(center, m) → cPoint(c) → nCircle(center_1, m_1) → c_1Point(c) → APoint(c) → BPoint(c) → DPoint(c) → EPoint(c) → FPoint(c) → GPoint(c) → HPoint(c) → IPoint(c) → JPoint(c) → KPoint(c) → LPoint(c) → MPoint(c) → NPoint(c) → OLineBisector(M, pointie) → g_1LineBisector(N, pointie) → h_1LineBisector(O, pointie) → i_1LineBisector(L, pointie) → j_1LineBisector(K, pointie) → k_1LineBisector(J, pointie) → l_1LineBisector(I, pointie) → n_1LineBisector(H, pointie) → p_1LineBisector(G, pointie) → q_1LineBisector(F, pointie) → r_1LineBisector(E, pointie) → s_1LineBisector(D, pointie) → t_1LineBisector(B, pointie) → b_1LineBisector(A, pointie) → d_1LineBisector(pointie, m) → e_1LineBisector(pointie, n) → f_2Point(c) → QPoint(c) → RPoint(c) → TPoint(c) → UPoint(c) → WLineBisector(Q, pointie) → g_2LineBisector(R, pointie) → h_2LineBisector(T, pointie) → i_2LineBisector(U, pointie) → j_2LineBisector(W, pointie) → k_2Point(c) → ZLineBisector(pointie, Z) → l_2Point(c) → PLineBisector(P, pointie) → fPoint(c) → CLineBisector(C, pointie) → gPoint(c) → SLineBisector(S, pointie) → h