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用心包裝的禮物
Author:
李春培
用心包裝的禮物
GeoGebra
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找出對稱軸
【案例】2013年安徽高考15题
拼砌四邊形
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
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正n凸多邊形旋轉對稱／反射對稱
正切與餘切函數
探究余弦定理
modulus and argument of z
方格紙上畫正方形 2
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Quadratic Equations
Sine
Hyperbola
Trigonometry
Inequalities