通过绘图求椭圆方程
几何画板及绘图内容加载中,请稍等……
①本范例演示如何通过绘图方法找到椭圆的方程;②涉及的核心数学概念包括椭圆、方程、向量、角度、多项式函数、线性函数和矩形;③作图要点——从下方『构造摘要』提炼用到了哪些 GeoGebra 命令/对象:RandomElement, If, Random, Hyperbola, Asymptote, Line, Intersect, Segment;④适合的学段或用途:高中数学解析几何教学,帮助学生理解椭圆方程的绘制与求解。
GeoGebra 命令及参数
RandomElement(L_1) → h1RandomElement(L_1) → kIf(h1 ≟ k, 9, h1) → hRandom(2, 12) → aRandom(1, 5) → f1Random(1, 2) → bHyperbola(E, D, B) → cHyperbola(I, H, F) → dIf(b ≟ 1, text3, text5) → t1If(b ≟ 1, text4, text4) → t2If(b ≟ 1, text6, text6) → t4Random(1, 4) → jIf(b ≟ 1, text5, text3) → t3If(m ≟ 1, "A", If[m ≟ 2, "B", If[m ≟ 3, "C", "D"]]) → text26If(j ≟ 1, "A", If[j ≟ 2, "B", If[j ≟ 3, "C", "D"]]) → text27Asymptote(c) → f_1, g_1Asymptote(d) → h_1, i_1Line(F, xAxis) → j_1Line(G, j_1) → k_1Intersect(j_1, h_1) → JIntersect(i_1, j_1) → KIntersect(k_1, xAxis) → LIntersect(i_1, k_1) → MIntersect(h_1, k_1) → NSegment(J, M) → l_1Segment(J, K) → m_1Segment(K, N) → n_1Segment(N, M) → p_1Asymptote(c) → q_1, r_1Line(C, yAxis) → s_1Line(B, yAxis) → t_1Intersect(r_1, s_1) → OIntersect(t_1, q_1) → PIntersect(q_1, s_1) → QIntersect(t_1, r_1) → RSegment(O, Q) → a_1Segment(Q, R) → b_1Segment(R, P) → c_1Segment(P, O) → d_1