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Author:
Ricky Chan
GeoGebra
New Resources
兩位數除以一位數（二）
異分母分數減法
四邉形 (四年級) 教師版
兩組對邊相等的四邊形
三位數除以一位數（一）
Discover Resources
柱體建築師
直線與圓的位置關係
Scheimpflug image
Locus: Fixed Distance From Fixed Point
八個方向
Discover Topics
Rotation
Sine
Random Experiments
Poisson Distribution
Hyperbola