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宋聿數學 第三冊 2-3 直線與圓的關係 ex6
Author:
宋秉祐
GeoGebra
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找出對稱軸
近似值：有效數字
【案例】2018年全国1卷理科12题
GeoGebra笔记功能体验课件
四邉形 (四年級) 教師版
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Fill the circle
congruent (SS)
正方形周界
椭圆的定义
Binary Clock 二进制时钟
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Fractal Geometry
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