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the definition of ellipse
Author:
丁明智
GeoGebra
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【案例】圆柱体内放置一个大球六个小球
第八周作业
平行線的斜率
【案例】2013年安徽高考15题
兩位數除以一位數（一）
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p9pppppppppppppppp
volume
九點圓
中點_圓_多邊形_軌跡
任意截面切割正方体
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Logarithm
Functions
Similarity Transformation or Similarity
Geometric Transformations
Quadratic Equations