Dudeney: 选择正确位置的几何构造
几何画板及绘图内容加载中,请稍等……
这个范例展示了如何利用几何构造确定三角形在坐标系中的正确位置。核心数学概念包括三角形性质、坐标几何和相似三角形。作图要点涉及使用Point、Polygon、Line、Circle等GeoGebra命令进行点、线、圆的构造。适合初中生学习几何作图和坐标系应用。
GeoGebra 命令及参数
Point(yAxis) → NPoint(xAxis) → OPolygon(N, O, P) → poly2, c, a, bLine(O, P) → c_1Line(P, N) → dLine(O, N) → ePoint(c_1) → BCircle(O, r) → s_3Intersect(s_3, c, 1) → HSegment(H, P) → sOrthogonalLine(B, s) → d_1Intersect(d_1, b) → IIntersect(d_1, c) → QIntersect(d_1, a) → RSegment(Q, I) → fSegment(R, I) → gPoint(g) → AOrthogonalLine(A, c_1) → hOrthogonalLine(A, e) → iOrthogonalLine(A, d) → jIntersect(c_1, h) → DIntersect(j, d) → EIntersect(i, e) → FSegment(A, D) → kSegment(F, A) → lSegment(A, E) → mPoint(f) → GOrthogonalLine(G, e) → e_1OrthogonalLine(G, c_1) → f_1OrthogonalLine(G, d) → g_1Intersect(g_1, d) → SIntersect(e_1, e) → TIntersect(f_1, c_1) → USegment(T, G) → h_1Segment(G, U) → i_1Segment(G, S) → j_1