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正20面体
Author:
2143550746
GeoGebra
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折扣
常见四边形是否是双心四边形
三角函数 的副本
撒针估算面积实验
科赫雪花
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二項分佈
量角器
正立方體變菱形12面體
選修數學
宇宙模型
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Bar Chart or Bar Graph
Cube
Function Graph
Median Line
Translation