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kwok ka yan
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lkkbmaths teachers 檔案儲存用
GeoGebra
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龙形曲线-分形龙
异形操场
盈利與虧蝕
第八周作业3
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中考压轴题大放送之十三
动态展示圆面积的构成
特別角的三角函數值(1)
梯形的面積
求兩斜線區域的差
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Arithmetic
Histogram
Right Triangles
Rectangle
Similar Triangles