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waaachen
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陳兪宏
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長度
GeoGebra
New Resources
畫出對稱圖形
小数 的副本
球體建築師
兩組對邊相等和有直角的四邊形
拼砌四邊形
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龍騰4課本
坐標測驗
T7 geobra
分數比較
周界
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Straight Lines
Surface
Random Experiments
Volume
Square