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觀察軌跡
Author:
陳政任
觀察軌跡
GeoGebra
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平行線的判定
撒针估算面积实验
椭圆内切圆链
球体的截面
GeoGebra数学资源(4-8年级)
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简易立体几何
勝者即正義
學習活動七頂點法
滑桿4
勾股定理
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Functions
Polygons
Inequalities
Correlation
Real Numbers