Since the radius of the unit circle is 1, the circumference is 2 x pi.
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The area of a circle with a 22-unit circumference is 38.515 square units.
Circumference of a circle = 2*pi*radius or pi*diameter 7*pi = 21.99114849 units Therefore the circumference ot the circle is 22 units correct to the nearest unit.
Simply multiply the diameter by Pi (about 3.1416): 24 x 3.1416 = 75.3984 unit circumference.
The circumference of a 34mm circle is: 107 mm
The circumference of this circle is about 14.45 units.