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蝴蝶定理动态演示
Author:
weizhuli(卫珠礼)
GeoGebra
New Resources
異分母分數減法
找出對稱軸
三位數除以一位數（一）
兩位數加法
兩位數除以一位數（二）
Discover Resources
生活
Apollonius Problem kissing coin problem
gjh-e01-02 未知數邊長的長方形
編織圓
扇形旋轉2
Discover Topics
Integers
Quadrilaterals
Tangent Function
Numbers
Planes