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固定周界的長方形的面積變化（周界是200厘米）
Author:
李寶玲
,
GeoGebra Institute of Hong Kong
GeoGebra
New Resources
Earth with coastline
小数 的副本
四邊形的特性
美國國旗 (Claude 版)
算柱 (兩位數)
Discover Resources
正餘弦函數的疊合102.11.27
兩圓關係與公切線
角柱
Question 3
Gazing Cow Problem (c)
Discover Topics
Conditional Probability
Area
Rotation
Special Points
Angles