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Penrose Stair2 (sequence)
Author:
s10555047
GeoGebra
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第八周作业2
撒针估算面积实验
常见四边形是否是双心四边形
第八周作业
盈利與虧蝕
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圓形與相似形
Net of circular cone
单晨答上海鲍老师
深圳2018 22
两角和的正弦公式
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Ellipse
Incircle or Inscribed Circle
General Quadrilateral
Integers
Matrices