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四邊形內部反射_長寬角度可調整
Author:
boooooooyu
GeoGebra
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球體建築師
兩位數加法
錐體建築師
三位數除以一位數（二）
画直线等分三角形的面积
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Addition / Subtraction of 3 Directed Numbers
Apollonius Problem 8 CLL homo 12
乘法口诀
P3 平行與垂直01 測試
最新的解一元二次方程式方法
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Conic Sections
Histogram
Algebra
Vectors
Median Line