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海龟爬行
Author:
赵林
GeoGebra
New Resources
画直线等分三角形的面积
異分母分數減法
畫出對稱圖形
兩位數加法
三位數除以一位數（一）
Discover Resources
選四塊來拼砌正方形
圓錐曲線---橢圓
动态三角形
Geometric Solids: Recognize, Name and Sort
三視圖3d眼鏡
一維對心碰撞動量守恒相圖分析_繁体版
Discover Topics
Similar Triangles
Line Segment
Parallelogram
Tree Diagrams
Continuity