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國旗上傳測試
Author:
Tone
GeoGebra
New Resources
兩位數加法
找出對稱軸
兩組對邊相等和有直角的四邊形
球体的体积推导（优化版）
四邊形的特性
Discover Resources
極線對偶定理 / polar duality theorem
時鐘與數學
伍四红 圆与正方形 面积同周长比较
赋值保存法
拼數咭
Discover Topics
Rotation
Geometric Mean
Logarithmic Functions
Equilateral Triangles
Median Value