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固定周界的長方形面積變化
Author:
phcheng
,
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
柱體建築師
畫出對稱圖形
三位數除以一位數（一）
画直线等分三角形的面积
Discover Resources
一階導函數
冪函數
正n凸多邊形旋轉對稱／反射對稱
外擺線
水流問題(黑板)
Discover Topics
Logarithm
Algebra
Variance
Hypergeometric Distribution
Polygons