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面積與周界活動
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lkkbmaths teachers 檔案儲存用
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兩組對邊相等和有直角的四邊形
異分母分數減法
画直线等分三角形的面积
四邉形 (四年級) 教師版
找出對稱軸
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技巧
反射定律 Law of Reflection
齊找對稱軸
分數乘法
单晨答空间曲面
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Correlation
Probability
Power Functions
Terms
Incircle or Inscribed Circle