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同心圓
Author:
賴詩唐
GeoGebra
New Resources
四邊形的特性
判斷球體
兩組對邊相等和有直角的四邊形
異分母分數減法
三位數除以一位數（一）
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waaachen
二次函数的条件最值
小數乘法
比例中的定值問題(三)
椭圆的离心率
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Cuboid
General Quadrilateral
Random Experiments
Conic Sections
Mathematics