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凹正方形
Author:
王玉霞
GeoGebra
New Resources
兩位數除以一位數（一）
算柱 (兩位數)
【案例】2013年安徽高考15题
找出對稱軸
兩組對邊相等和有直角的四邊形
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二次函數係數與圖像的關係
ego-motion
軌跡觀察---圓及正三角形上線段中點
圓繞圓內外
微分量 (Differentials)
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Equations
Cube
Hypothesis Testing
General Quadrilateral
Poisson Distribution