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hwpctablet
GeoGebra
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兩組對邊相等和有直角的四邊形
算柱 (兩位數)
GeoGebra笔记功能体验课件
兩位數除以一位數（一）
四邉形 (四年級) 教師版
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GGB研習作品
三節棍
Orthographic views example
圆的面积展开的副本
圆周率π的收敛极快算法（代数几何方法）
Discover Topics
LCM and GCD
Planes
Standard Deviation
Prism
Conic Sections