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畢氏定理完成20170330
Author:
許志昌
GeoGebra
New Resources
四邉形 (四年級) 教師版
錐體建築師
兩位數除以一位數（一）
異分母分數減法
球體建築師
Discover Resources
鋪地磚(六邊形)
餘數處理
erwtewt的副本
二次函数图像的性质探究
COVID-19 折線圖
Discover Topics
Matrices
Prism
Real Numbers
Hypothesis Testing
Right Triangles