The measure around a circle is called a circumference, rather than a perimeter. The term "perimeter" is used for polygons. The circumference of a circle is equal to the diameter, multiplied by pi - or to the radius, multiplied by 2 x pi. The number pi - which can be defined precisely as the ratio between the circumference and the diameter of a circle - is approximately 3.1416.
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The perimeter of a circle is its circumference
The perimeter of a circle would be the circumference.
The circumference of a circle is the length of the circle's perimeter.
When the shape is a circle, then the perimeter is called"circumference".The circumference IS the perimeter of a circle.
The length of the perimeter is the circumference. The perimeter itself is the boundary between the interior and exterior of the circle. The perimeter of a circle is called the circumference