How do you wrap a string into a "perfect" circle? My sister needs help with her homework!

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How do you wrap a string into a "perfect" circle? My sister needs help with her homework! #Primary schoolwork #Scientific teenager Mi Wu #Scientific experiment 如何将一根绳子围成一个“完美”的圆呢？妹妹的作业急需帮忙！#小学生作业 #科学少年米吴 #科学实验 #string #"perfect" #circle? #sister #needs #homework! ##Primary #schoolwork ##Scientific #teenager ##Scientific #experiment #Primary #Scientific #Scientific
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