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cktsang
GeoGebra
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三位數除以一位數(二)
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
錐體建築師
畫出對稱圖形
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優良作品5(沛綺)
認識圓
基測數學100-1-30 等腰三角形的角度
平移
題6
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Random Experiments
Orthocenter
Random Variables
Kite
Straight Lines