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Slogan symbol video

1. Circle: S=π(R? -r? )=3πr?

Second, Tai Chi: This can be seen directly. The area of black and white is half: S=0.5*πR? =2πr?

3. Add a small circle at three quarters of the ring: S=(3/4)*3πr? +πr? =( 1 1/4)πr?

Obviously, the smallest area is the second Tai Chi pattern.

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