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椭圆的定义
Author:
GeoGebra Institute of WuXi
GeoGebra
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球体的体积推导
兩組對邊相等和有直角的四邊形
畫出對稱圖形
兩位數除以一位數（二）
【案例】2013年安徽高考15题
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優良作品5
學資p.13第7題
圈柱
小數
填色問題(封閉圖形)
用方程解周界問題
Discover Topics
Vectors 2D (Two-Dimensional)
Prism
Numbers
Subtraction
Quadrilaterals