球体与平面中的垂心与外心
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本范例展示了球体与平面上的垂心与外心的概念。垂心是三角形三条高的交点,外心是三角形三边中垂线的交点。通过使用GeoGebra命令如Sphere, PointIn, Plane, IntersectPath等,可以直观地理解这些几何概念。适合高中数学教学和学习。
GeoGebra 命令及参数
Sphere(A, 1) → aPointIn(a) → BPointIn(a) → CPointIn(a) → DPlane(A, B, C) → bPlane(A, C, D) → cPlane(A, B, D) → dIntersectPath(b, a) → eIntersectPath(d, a) → fIntersectPath(c, a) → gOrthogonalLine(A, d) → hOrthogonalLine(A, b) → iOrthogonalLine(A, c) → jPlane(B, j) → kPlane(C, h) → lIntersectPath(l, a) → pIntersectPath(k, a) → qPlane(D, i) → mIntersectPath(m, a) → rIntersect(r, q, 1) → HCircle(B, C, D) → sPlane(B, C, D) → nOrthogonalLine(A, n) → tIntersect(t, a, 2) → OPlane(O, j) → oPlane(O, i) → uPlane(O, h) → vIntersectPath(u, a) → c_1IntersectPath(v, a) → d_1IntersectPath(o, a) → e_1Intersect(g, e_1, 2) → EIntersect(c_1, e, 1) → FIntersect(f, d_1, 2) → GCircle(F, G, E) → f_1Polygon(I, J, K) → t1, k_1, i_1, j_1OrthogonalLine(I, i_1) → g_1OrthogonalLine(J, j_1) → h_1LineBisector(J, K) → l_1LineBisector(K, I) → m_1Intersect(g_1, h_1) → LIntersect(l_1, m_1) → M