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Projection of vector in R2
Author:
sealion1215
GeoGebra
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四邉形 (四年級) 教師版
兩位數加法
三位數除以一位數（一）
【案例】2013年安徽高考15题
【案例】圆柱体内放置一个大球六个小球
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以剪貼比較圖形大小
四角錐體的截面
Basketball
線性組合3：正方形
classifying triangles
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Triangles
Ratios
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Congruence
Difference and Slope