Editing Regular polygon (section)

===Angles===
For a regular convex ''n''-gon, each [[interior angle]] has a measure of:
: <math>\frac{180(n - 2)}{n}</math> degrees;
: <math>\frac{(n - 2)\pi}{n}</math> radians; or
: <math>\frac{(n - 2)}{2n}</math> full [[turn (geometry)|turns]],

and each [[exterior angle]] (i.e., [[supplementary angle|supplementary]] to the interior angle) has a measure of <math>\tfrac{360}{n}</math> degrees, with the sum of the exterior angles equal to 360 degrees or 2π radians or one full turn.

As ''n'' approaches infinity, the internal angle approaches 180 degrees. For a regular polygon with 10,000 sides (a [[myriagon]]) the internal angle is 179.964°. As the number of sides increases, the internal angle can come very close to 180°, and the shape of the polygon approaches that of a circle. However the polygon can never become a circle. The value of the internal angle can never become exactly equal to 180°, as the circumference would effectively become a straight line (see [[apeirogon]]). For this reason, a circle is not a polygon with an infinite number of sides.