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平面線性變換=（幾乎）推移＋伸縮
Author:
Wu Xiao-Ren
Topic:
Algebra
GeoGebra
New Resources
四邉形 (四年級) 教師版
四邊形的特性
拼砌四邊形
第八周作业
画直线等分三角形的面积
Discover Resources
simson line
例子
Text in Spreedsheet
Inclined plane (Angle between two planes)
任意凸多边形的滚动
Discover Topics
Upper and Lower Sum or Riemann Sum
Parametric Curves
Centroid or Barycenter
Definite Integral
Optimization Problems