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矩形等距曲線
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
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三位數除以一位數（一）
拼砌四邊形
畫出對稱圖形
三位數除以一位數（二）
異分母分數減法
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真分數相乘
[問題] a² + b² = 1, (c-4)² + (d-2)² = 5，求 ad - bc 最大值？
circle1
線性規劃
基本作圖2
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Cosine
Secant Line or Secant
Vectors 3D (Three-Dimensional)
Differential Equation
Prism