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GeoGebra
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兩組對邊相等和有直角的四邊形
錐體建築師
球體建築師
兩位數除以一位數（一）
拼砌四邊形
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畢氏定理
作業
畢氏定理證明
Conics
同角三角函数的基本关系（正六边形记忆法）
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Translation
Cube
Cosine
Rotation
Area