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工具：PlaneArrows, PlaneText... (v.2)
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
算柱 (兩位數)
畫出對稱圖形
三位數除以一位數（二）
第八周作业
錐體建築師
Discover Resources
三角柱
课前热身
仙后座找北極星 (底稿)
假定平均數(教師講解用)
椭圆的一种画法.许兴华数学
Discover Topics
Right Triangles
Line Segment
Centroid or Barycenter
Polynomial Functions
Hypothesis Testing