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動態軌跡與動態色彩
Author:
lee chao ming
GeoGebra
New Resources
兩組對邊相等的四邊形
畫出對稱圖形
兩位數除以一位數（二）
第八周作业
拼砌四邊形
Discover Resources
畢氏定理拼圖
example
劉虹圻 垂心
旋轉方形
连续半圆上的动点运动规律
Discover Topics
Tangent Line or Tangent
Difference and Slope
Trigonometry
Rational Numbers
Parametric Curves