Symmetry of The Boy's Surface
Boy's surface has 3-fold symmetry. This means that it has an axis of discrete rotational symmetry: any 120° turn about this axis will leave the surface looking exactly the same. The Boy's surface can be cut into three mutually congruent pieces.
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—George Gordon Noel Byron (1788–1824)
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—George Gordon Noel Byron (1788–1824)
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