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folding aeroplane
Author:
Li Wai Leung
GeoGebra
New Resources
判斷球體
sanjiaohanshu
拼砌四邊形
近似值：有效數字
小数 的副本
Discover Resources
橢圓的定義畫圖
Quiz on True Bearings 真方位角：測驗
測試繪本
我的第一个GGB绘本
扇形滚动(圆心角半径可变)
Discover Topics
Linear Programming or Linear Optimization
Histogram
Optimization Problems
Equations
Geometry