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2 in regular and 1 in normal oval(egg)
None. An oval is a "squashed" circle.
None. An oval has only one curved perimeter - no sides.
A triangle can have no parallel lines.
deltaAnswerThere are several categories that meet this criteria:Among two dimensional shapes:Any regular polyhedron with an odd number of sides will not have any parallel sidesAny circle oval or ellipseAny closed shape made of arcsCycloidFor three dimensional shapes: SpheresCones