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3外切圓
Author:
陳兪宏
GeoGebra
New Resources
四邊形的特性
sanjiaohanshu
兩組對邊相等和有直角的四邊形
拼砌四邊形
三位數除以一位數（二）
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圓圓求切圓
豆奶
一次函數平移(進階)
錐體的橫截面
和两个圆都相切的圆
Discover Topics
Unit Circle
Calculus
Constructions
Multiplication
Trapezoid