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GeoGebra
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四邉形 (四年級) 教師版
兩位數加法
兩位數除以一位數(二)
判斷球體
【案例】2018年全国1卷理科12题
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橢圓的軌跡
四点共圆
複利計算(1)
圓與切線
單點透視法
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Median Line
Dilation
Constructions
Complex Numbers
Percentages