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There is no special unit related to the distance around a circle. It's a distance, a length measurement.
Pick what fits. Millimeters, inches, yards, kilometers....
It's possible to describe it in degrees too, referring to the width of an angle as seen from the center.
Rarely used outside fairly specialized navigation purposes.
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When was it confirmed that there was 360 degrees in a circle?
It was never confirmed. The degree was created as a unit equal to one three hundred sixtieth of the way around a circle
What is the circumference of a unit circle?
Since the radius of the unit circle is 1, the circumference is 2 x pi.
What is a cube whose edges measure 1 unit?
A 'unit cube'. Just like a circle with radius 1 and center at (0,0) is a 'unit circle'.
Find all the coordinates of the points on unit circle?
If x2 + y2 = 1, then the point (x,y) is a point on the unit circle.
What is pi over 12 on a radian unit circle?
Pi over 12 on a radian unit circle is a little more than a quarter of the circle. Radian units are an alternative to degrees.
