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Angle Between a Line and a Plane Definition 線與平面的交角 定義
Author:
Steven S. H. Chu
GeoGebra
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兩位數加法
異分母分數減法
兩位數除以一位數（二）
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等和有直角的四邊形
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ggb-fs-b1 分數擴分
三棱柱
Copy of glt-h02-00-正方形折成三角錐
Mathematics and Optics (and their applications)
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Distributions
Translation
Cuboid
Percentages
Surface