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Ex (AAS)
Author:
Ricky Chan
GeoGebra
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兩組對邊相等的四邊形
判斷球體
【案例】2018年全国1卷理科12题
球体的体积推导（优化版）
兩位數除以一位數（一）
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happy new year
教學－面與面的夾角
三節棍的軌跡
Proof1 楊玉峰
Quiz on Reflection 反射變換：測驗
Discover Topics
Cosine
Area
Difference and Slope
Constructions
Random Variables