Depends on what your trying to say.Either can be correct.examples:Something can be centered on a table.A conversation can be centered around a certain topic.A conversation can't be centered around anything. It can revolve around something or center on something, but "center around" is a conflation of these two expressions.
The imaginary line around a state or country is called a border.
Fench trade in north america centered around what
The equator is an imaginary line which indicates where the middle of the earth is and it goes around.
The Earth has an imaginary shield around it.
the equator ========= There are many imaginary lines around the Earth. In fact, there are an infinite number of imaginary lines. The two main types of imaginary lines are parallels of latitude (of which the Equator is one) and meridians of longitude.
The colony of Maryland was centered around the Chesapeake Bay.
The imaginary horizontal line that goes around the middle of the earth is called the equator.
Unicorns have been around for a long time, so they were around in medieval times, but no, they were not and are not just imaginary.
the equator is the imaginary line around the earth.
Dynasty centered around the Carrington family.
It was (and still is) centered around two things: the law of God and human relationships.