Enneadecagon

An enneadecagon or 19-gon is a shape with 19 sides and 19 corners.. It is also known as an enneakaidecagon or a nonadecagon..

 Regular enneadecagon 
All sides of a regular enneadecagon are the same length. Each corner is ≈161.052°. All corners added together equal 3060°.

The radius of the circumcircle of the regular enneadecagon with side length t is 
 (angle in degrees). The area, where t is the edge length, is 

References

enneadecagon

Other websites

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