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Mathematics 8 Online
OpenStudy (anonymous):

what does the open/closed circle on the number line mean? what does the open/closed circle on the number line mean? @Mathematics

OpenStudy (saifoo.khan):

closed = less than equal to, greater than equal to. open, only less than, only greater than

OpenStudy (mertsj):

If the circle is closed it means that the number is part of the solution. If the circle is open, it means that the number is not part of the solution.

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