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畢氏三元數
Author:
陳隆期
GeoGebra
New Resources
畫出對稱圖形
画直线等分三角形的面积
兩組對邊相等的四邊形
拼砌四邊形
三位數除以一位數（一）
Discover Resources
歷屆考題
跑馬燈
Triangle
比較數量-1
Quiz on Addition and Subtraction of Directed Numbers (2)
Discover Topics
Reflection
Polygons
Isosceles Triangles
Numbers
Differential Equation