PMC 2009-10 Q12

Author:
Arthur Lee
題目十二
圓上有7個可移動的點。透過移動這些點，可得以下那一些圖案？ Please find the full question with diagrams in this pdf file: https://www.dropbox.com/s/8jqsx3p0zkje5s3/Primary_Math_Contest_09_10_Answers.pdf?dl=0

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