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Author:
Ng Ching Yi
GeoGebra
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美國國旗 (Codex 版)
兩組對邊相等的四邊形
四邉形 (四年級) 教師版
球體建築師
找出對稱軸
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ghseh 二次函數描點法左右平移-1
尺規作圖平分一個角
圓與正方形中點軌跡1060317
Newton's method
拋物線4-平行四邊形法
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Dilation
Rational Numbers
Secant Line or Secant
Statistics
Trapezoid