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Author:
sheri.chen
GeoGebra
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兩位數除以一位數（一）
兩組對邊相等的四邊形
柱體建築師
四邉形 (四年級) 教師版
【案例】圆柱体内放置一个大球六个小球
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四邊形
餘弦函數值的變化
角平分線作圖1213
創作對稱圖形 LEVEL 4
斜坡上的線與交角
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Planes
Difference and Slope
Logarithm
Cosine
Power Functions