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勘根定理
Author:
顏銓志 ycj
GeoGebra
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兩位數除以一位數（一）
兩位數除以一位數（二）
兩位數加法
異分母分數減法
兩組對邊相等的四邊形
Discover Resources
多邊形的切割與拼砌
角速度概念
Trianglar prism
线性方程组
河內塔 3D (Tower of Hanoi 3D)
Discover Topics
Perimeter
Cuboid
Right Triangles
Linear Equations
Geometric Mean