Answers

2015-08-04T16:59:45+05:30
a round plane figure whose boundary (the circumference) consists of points equidistant from a fixed point 
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2015-08-04T17:06:38+05:30
a round plane figure whose boundary (the circumference) consists of points equidistant from a fixed point (the centre).
                           OR
a group of people with a shared profession, interests, or acquaintances
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