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平方差公式
Author:
lizuoxiang
GeoGebra
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【案例】2013年安徽高考15题
拼砌四邊形
兩組對邊相等的四邊形
四邉形 (四年級) 教師版
GeoGebra笔记功能体验课件
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七巧板
cute panda
小棒
三角形ㄛ
纏繞畫1
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Geometric Mean
Hyperbola
Rhombus
General Quadrilateral
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