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倾斜角与斜率
Author:
杨晓晨
GeoGebra
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双心四边形
撒针估算面积实验
比較五件物件的重量
平行線的斜率
龙形曲线-分形龙
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量度的誤差 Errors in Measurement
正三角形內一點P, 到三頂點距3,4,5
happy planet
均值不等式的一种几何证明.许兴华数学
滑轮组2
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Tree Diagrams
Polynomial Functions
Similarity Transformation or Similarity
Sequences and Series
Means