平行四边形与椭圆交点交互演示
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①本范例演示平行四边形与椭圆的交点动态变化现象;②涉及核心数学概念包括解析几何、交点计算、分数运算及角度测量;③构造要点运用了Random, RandomElement, Textfield, TableText, Polygon等GeoGebra命令与对象,实现参数化生成与交互式展示;④适合高中及以上数学教学,用于解析几何实践与几何直观培养。
GeoGebra 命令及参数
Random(-10, 10) → aRandom(-10, 10) → bRandomElement({-5, -4, -3, -2, -1, 1, 2, 3, 4, 5}) → cTextfield(h) → InputBox1RandomElement({-5, -4, -3, -2, -1, 1, 2, 3, 4, 5}) → a_1Random(-10, 10) → b_1RandomElement({-5, -4, -3, -2, -1, 1, 2, 3, 4, 5}) → c_1Random(-10, 10) → d_1Textfield(m) → InputBox2Textfield(g) → InputBox3Textfield(f) → InputBox4TableText({{A1_1, B_1, C_1, D_1}, {-3, g(-3), h(-3), f(-3)}, {-2, g(-2), h(-2), f(-2)}, {-1, g(-1), h(-1), f(-1)}, {0, g(0), h(0), f(0)}, {1, g(1), h(1), f(1)}, {2, g(2), h(2), f(2)}, {3, g(3), h(3), f(3)}, {1, e, l, k}}, "|_") → text3_1Polygon(B, C, D, E) → poly1, b_2, c_1, d_2, e_1