It is: (pi*radius)+(diameter)
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It is half the circle's circumference plus its diameter.
Circumference divided by Pi
The perimeter is the distance around the square. All four sides of a square are of equal length. The formula for finding the perimeter of a square is P = 4s (the length of one side multiplied by four)
To find the circumference (distance around) of a circle, use the formula pi x d (d=diameter)
The distance around a circle is its circumference.