The perimeter of a circle is it's circumference, and the formula is pi x d.
3.14 x 2.5 is equal to 7.85
the perimiter of a circle is called the circumference
the circumference=diamter times pi
pi=π≈3.14
given that the diameter is 2.5, the circumference or perimiter is 2.5π≈2.5*3.14=7.86 units
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