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gjc102a14 三角形內的高
Author:
均一
GeoGebra
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異分母分數減法
兩組對邊相等的四邊形
判斷球體
畫出對稱圖形
三位數除以一位數（二）
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能量守恆
glt-h02-00-正方形折成三角錐
CircleIII
Triangles with the same height
单晨答GeoGebra绘图与课件制作北京王勇第二题
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Step Functions
Expected Value
Diagrams
Calculus
Triangles