三角形重心验证
几何画板及绘图内容加载中,请稍等……
本范例演示如何通过给定的三角形ABC(顶点分别为A(-2, 4),B(5, 4),C(3, -2))验证其重心。涉及的核心数学概念包括三角形的重心定义和计算方法。通过使用GeoGebra命令如Polygon, Line, Segment, Midpoint, Intersect等进行几何作图。适合初中及以上学生学习解析几何中的三角形性质。
GeoGebra 命令及参数
Polygon((instructionEdge, y(Corner[1])), Corner[2], Corner[3], (instructionEdge, y(Corner[4]))) → instruction, instructionBottom, instructionRight, instructionTop, instructionLeftLine((instructionEdge + ((4 * indent) * screenwidth), 0), yAxis) → align3Line((instructionEdge + ((3 * indent) * screenwidth), 0), yAxis) → align2Line((instructionEdge + ((2 * indent) * screenwidth), 0), yAxis) → align1Segment(A, B) → aSegment(B, C) → bSegment(C, A) → cMidpoint(a) → TMidpoint(c) → VMidpoint(b) → ULine(T, C) → eLine(U, A) → fIntersect(f, e) → XLine(V, B) → dGCD(AUdistance2, AXdistance2) → AgcdGCD(BXdistance2, BVdistance2) → Bgcd