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Rotational Symmetry
Author:
user3390
Topic:
Symmetry
testing
GeoGebra
New Resources
三位數除以一位數（二）
画直线等分三角形的面积
兩組對邊相等和有直角的四邊形
拼砌四邊形
兩位數加法
Discover Resources
四邊形的「等角分點」
向量分點公式
周界-平移法(練習四)
Centres
中研院數學所
Discover Topics
Logarithmic Functions
Surface
Tangent Line or Tangent
Natural Numbers
Multiplication