Enneadecagon

Template:Regular polygon db An enneadecagon or 19-gon is a shape with 19 sides and 19 corners. It is also known as an enneakaidecagon or a nonadecagon.Length and edges are 19.

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 $R=\frac{t}{2}\csc \frac{180}{19}$ (angle in degrees). The area, where t is the edge length, is $\frac{19}{4}{t}^2\cot \frac{\pi }{19}\simeq 28.4652t^2.$

References

• enneadecagon

Other websites

• Template:MathWorld