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angle 123
Author:
zhihuai1982
GeoGebra
New Resources
兩位數除以一位數（一）
異分母分數減法
找出對稱軸
兩位數除以一位數（二）
球體建築師
Discover Resources
八年级数学竞赛之比例线段
All in one (centres of triangle)
規律物件集的製作
躲掉1,-1,0的動態文字
圆面积和周长展开示意图
Discover Topics
Vectors
Sine
Polynomial Functions
Reflection
Linear Programming or Linear Optimization