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圓外切四邊形對邊和等長
Author:
謝易達
GeoGebra
New Resources
画直线等分三角形的面积
兩組對邊相等和有直角的四邊形
【案例】圆柱体内放置一个大球六个小球
三位數除以一位數（一）
兩位數加法
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quadrilaterals 3
三角層疊
正20面體展開
割圓
教學媒體
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Optimization Problems
Constructions
Planes
Circle
Linear Equations