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封閉圖形的斜線區域
Author:
張道民
GeoGebra
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三位數除以一位數（二）
【案例】2013年安徽高考15题
GeoGebra笔记功能体验课件
兩位數加法
画直线等分三角形的面积
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第12届美国中学生数学邀请赛题
Pyramid and Cone 2
優良作品4(薇如)
reflectional symmetry_2
放射狀圖形
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General Quadrilateral
Symmetry
Difference and Slope
Straight Lines
Sequences and Series