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Author:
chen mingchuan
GeoGebra
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【案例】圆柱体内放置一个大球六个小球
柱體建築師
兩位數除以一位數（一）
画直线等分三角形的面积
第八周作业
Discover Resources
方格紙上畫四邊形
Test1
釘版
探究余弦定理
热带风暴storm
Discover Topics
Secant Line or Secant
Geometry
Rhombus
Optimization Problems
Quadrilaterals