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ie 7
Author:
LAM YU SANG
GeoGebra
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近似值：有效數字
拼砌四邊形
兩組對邊相等和有直角的四邊形
畫出對稱圖形
美國國旗 (Codex 版)
Discover Resources
初犯九點圓
三角函數角度轉換
動畫基本滑桿
函数作图工具的副本
割圆术估计圆周率（刘徽）
Discover Topics
Indefinite Integral
Translation
Symmetry
Stochastic Process or Random Process
Geometric Transformations