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Angle at centre twice angle at circumference
Author:
Big Lee
GeoGebra
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拼砌四邊形
異分母分數減法
畫出對稱圖形
兩位數加法
三位數除以一位數（二）
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二次函数的条件最值
Brahmagupta 四邊形的構造方法
S1 Ex9.2 Q17
三圓外切
earth
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Stochastic Process or Random Process
Logic
Interest Calculation
Angles
Limits