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正方形推垛
Author:
柳淳珈
GeoGebra
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找出對稱軸
近似值：有效數字
sanjiaohanshu
兩位數除以一位數（一）
拼砌四邊形
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正n邊形內角與外角
橢圓折痕
五圓相切
斜坡上的線與交角
基础知识
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Secant Line or Secant
Rational Numbers
Special Points
Cuboid
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