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waaachen
Author:
陳兪宏
waaachen
GeoGebra
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兩位數除以一位數（一）
画直线等分三角形的面积
錐體建築師
球体的体积推导（优化版）
算柱 (兩位數)
Discover Resources
Sequence指令練習(逐一套疊三角形)
Introduction to Trigonometry from a Unit Circle
三角形
straight line
畢氏定理-切割法
Discover Topics
Rectangle
Cylinder
Cube
Interest Calculation
Matrices