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平移旋轉對稱
Author:
chen mingchuan
GeoGebra
New Resources
三位數除以一位數（一）
四邉形 (四年級) 教師版
兩位數加法
找出對稱軸
球体的体积推导（优化版）
Discover Resources
題九
弹簧变化
Quiz on Reflection 反射變換：測驗
Equality of Ratios
cycloid
Discover Topics
Confidence Interval
Parametric Curves
Parallelogram
Planes
Right Triangles