外心/垂心/重心
几何画板及绘图内容加载中,请稍等……
①本范例演示了三角形的外心、垂心和重心这三个重要点的几何性质与关系;②涉及的核心数学概念包括三角形几何、坐标几何、向量运算;③作图要点——从下方『构造摘要』提炼用到了Point(点)、Segment(线段)、Circle(圆)、Intersect(交点)、Line(直线)等GeoGebra命令/对象;④适合高中及以上数学学习者,用于理解三角形核心点的定义、性质及其相互关系,为深入学习几何变换和解析几何打下基础。
GeoGebra 命令及参数
Point(xAxis) → APoint(yAxis) → BPoint(xAxis) → CSegment(B, A) → fSegment(C, A) → gSegment(B, C) → hCircle(A, 3) → cCircle(C, 3) → dCircle(B, 3) → eIntersect(d, e, 2) → DIntersect(d, e, 1) → ELine(D, E) → iIntersect(c, d, 1) → FIntersect(c, d, 2) → GLine(F, G) → jIntersect(c, e, 1) → HIntersect(c, e, 2) → ILine(H, I) → kIntersect(i, j) → JIntersect(k, f) → KIntersect(i, h) → LIntersect(j, g) → MSegment(K, C) → lSegment(M, B) → mSegment(L, A) → nIntersect(l, m) → NCircle(A, P) → pIntersect(p, h, 1) → QIntersect(p, h, 2) → RCircle(Q, 3) → qCircle(R, 3) → rIntersect(q, r, 1) → SLine(S, A) → sCircle(E, G) → c_1Circle(M, 4) → d_1Circle(A, 1.5) → tIntersect(t, h, 1) → TCircle(T, 2) → e_1Circle(L, 2) → f_1Intersect(e_1, f_1, 1) → ULine(A, U) → aCircle(C, 1) → g_1Intersect(g_1, xAxis, 2) → WSegment(C, W) → bCircle(W, 2) → h_1Intersect(g_1, h_1, 1) → ZCircle(Z, 2) → k_1Intersect(h_1, k_1, 2) → A_1Line(C, A_1) → i_1Intersect(a, i_1) → G_1Intersect(a, i_1) → H_1