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正三角形在长方形边上移动加滚动
Author:
赵林
GeoGebra
New Resources
兩位數加法
找出對稱軸
畫出對稱圖形
兩組對邊相等和有直角的四邊形
判斷球體
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正9邊形
a為底之指數函數圖形
函数作图工具的副本
三角形重心的变化.许兴华数学
S3_Ch4.3_立體圖形的三視圖(3D圖)
Discover Topics
Geometric Mean
Centroid or Barycenter
LCM and GCD
Rotation
Parallelogram