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congruent (SA) 2
Author:
Ricky Chan
GeoGebra
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球体的体积推导
兩組對邊相等和有直角的四邊形
畫出對稱圖形
三位數除以一位數（一）
【案例】2013年安徽高考15题
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優良作品3(薇如)
Angle between Lateral Faces 1
錯角練習
gjc090c21內切圓的圓心
手拉手模型
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Tree Diagrams
Binomial Distribution
Natural Numbers
Congruence
Division