Besonderhede van voorbeeld: -8439841653816573331

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English[en]
If during some time during this rotation, before we reach an entire rotation, see the figure completely cover its original value, then we have a rotation symmetry.
Swedish[sv]
Om vi någon gång under rotationen, innan vi roterat ett helt varv, får figuren att helt överlappa sitt ursprungliga värde, har vi en rotationssymmetri.

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