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畢氏定理完成20170330final
Author:
許志昌
GeoGebra
New Resources
柱體建築師
找出對稱軸
兩位數除以一位數（一）
四邊形的特性
拼砌四邊形
Discover Resources
圓&五邊形
數位學習社
擴分和約分
纏繞圖 20180317四箴國中研習
二面角
Discover Topics
Intersection
Parallelogram
Trigonometric Functions
Equilateral Triangles
Equations