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Author:
Ting Chui Yee
GeoGebra
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正方形雪花图案
常见四边形是否是双心四边形
第八周作业3
第八周作业2
第八周作业1
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生活
angles sum on a striaght line
椭圆的定义的副本
大小不同串珠
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Tangent Function
Symmetry
Rectangle
Dilation
Trapezoid