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椭圆的定义
Author:
guomenglin
Topic:
Ellipse
GeoGebra
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【案例】2013年安徽高考15题
【案例】圆柱体内放置一个大球六个小球
四邊形的特性
異分母分數減法
兩位數除以一位數（一）
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折扣 例3
圆的面积展开
梯形
Rotation
橢圓旋轉
Discover Topics
Kite
Quadratic Functions
Dilation
Geometry
Perimeter