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圆与圆的位置关系
Author:
蔡永志
圆与圆的位置关系
GeoGebra
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兩組對邊相等和有直角的四邊形
異分母分數減法
GeoGebra笔记功能体验课件
兩位數除以一位數（二）
兩位數除以一位數（一）
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轴对称
ch14 p.30#31
Mathematics and Optics (and their applications)
venn图着色
工作紙(1) 思考題
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Fractal Geometry
Constructions
Rotation
Perimeter
Matrices