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椭圆的离心率
Author:
孟宝兴
GeoGebra
New Resources
兩位數除以一位數（一）
柱體建築師
算柱 (兩位數)
找出對稱軸
画直线等分三角形的面积
Discover Resources
Symetry
兩函數間面積
Combined Quiz on Bearings 方位：合併測驗
十分位分數
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Discover Topics
Cylinder
Circle
Quadrilaterals
Square
Cosine