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62326 旋轉長方形
Author:
呂麗珠
GeoGebra
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四邊形的特性
畫出對稱圖形
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
算柱 (兩位數)
Discover Resources
費爾巴哈(Feuerbach)定理
Li Shan Lan Cone Pi
沈暐珊 橢圓反射
愛心
单晨正方形在正六边形内部滚动的课件
Discover Topics
Matrices
Median Line
Natural Numbers
Calculus
Hypothesis Testing