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Author:
陳兪宏
小手解答版!!!!
GeoGebra
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【案例】2018年全国1卷理科12题
錐體建築師
兩組對邊相等的四邊形
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
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方向導數 (Directional Derivative)
Desargues 定理
約分
GGB11
anlge at centre twice angle at circumference
Discover Topics
Addition
Median Line
Real Numbers
Quadrilaterals
Reflection