EntityQ3751781· pop 11· linked from 30 articlesdominoSign in to savepolyomino of order 2; polygon in the plane made of two equal-sized squares connected edge-to-edgeConnectionspolyominoEntityInternational Standard Book NumberEntitysquareEntityWayback MachineEntitypolygonEntitydigital object identifierEntityTetrisEntitydominoesEntityrotationEntityJSTOROrganizationchessboardEntitytangramEntitytatamiEntitytessellationEntityFibonacci sequenceEntitypower of twoEntityreflectionEntitypentominoEntityMathematical ReviewsEntitySoma cubeEntityCategoriesPolyforms