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Apollonius Problem gergonne
Author:
tkyggb
GeoGebra
New Resources
三位數除以一位數（二）
拼砌四邊形
畫出對稱圖形
兩位數加法
兩位數除以一位數（一）
Discover Resources
正切與餘切函數
中研院數學所
黎曼和與積分
一次函数图象及性质
sinx & cscx
Discover Topics
Constructions
Statistical Characteristics
General Quadrilateral
Arithmetic
Integers