三角形重心验证

三角形重心验证
几何画板及绘图内容加载中,请稍等……
2014-11-04 00:16
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

  1. Polygon((instructionEdge, y(Corner[1])), Corner[2], Corner[3], (instructionEdge, y(Corner[4]))) → instruction, instructionBottom, instructionRight, instructionTop, instructionLeft
  2. Line((instructionEdge + ((4 * indent) * screenwidth), 0), yAxis) → align3
  3. Line((instructionEdge + ((3 * indent) * screenwidth), 0), yAxis) → align2
  4. Line((instructionEdge + ((2 * indent) * screenwidth), 0), yAxis) → align1
  5. Segment(A, B) → a
  6. Segment(B, C) → b
  7. Segment(C, A) → c
  8. Midpoint(a) → T
  9. Midpoint(c) → V
  10. Midpoint(b) → U
  11. Line(T, C) → e
  12. Line(U, A) → f
  13. Intersect(f, e) → X
  14. Line(V, B) → d
  15. GCD(AUdistance2, AXdistance2) → Agcd
  16. GCD(BXdistance2, BVdistance2) → Bgcd