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圓外切及內切
Author:
luke huang
GeoGebra
New Resources
找出對稱軸
兩組對邊相等的四邊形
判斷球體
三位數除以一位數（一）
兩位數除以一位數（二）
Discover Resources
方格紙上畫正方形1
平行四邊形與菱形的分別
畢氏定理
轨迹
第一次尝试
Discover Topics
Functions
Equations
Correlation
Standard Deviation
Right Triangles