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圆的有关概念
Author:
孟宝兴
GeoGebra
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三角函数 的副本
垂直線的斜率
盈利與虧蝕
第八周作业
常见四边形是否是双心四边形
Discover Resources
gtx-f03-usa-01 美國國旗
y=2^x
圓錐展開
分數化百分數(以方程計算，增潤項目)
平行四边形变形
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Reflection
Combinatorics
Circumcircle or Circumscribed Circle
Solids or 3D Shapes
Numbers