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长方体高减少
Author:
吕玉雷
GeoGebra
New Resources
第三周作业效果演示
第八周作业3
常见四边形是否是双心四边形
斐波那契螺旋弧线（表格法）
平行線的判定
Discover Resources
圓形與相似形
題5
角平分線
比較角的大小二
文繞圖2
Discover Topics
Calculus
Vectors 2D (Two-Dimensional)
Upper and Lower Sum or Riemann Sum
Function Graph
Solids or 3D Shapes