Enneadecagon facts for kids
Quick facts for kids Regular enneadecagon 


A regular enneadecagon


Type  Regular polygon 
Edges and vertices  19 
Schläfli symbol  {19} 
Coxeter diagram  
Symmetry group  Dihedral (D_{19}), order 2×19 
Internal angle (degrees)  ≈161.052° 
Dual polygon  Self 
Properties  Convex, cyclic, equilateral, isogonal, isotoxal 
A enneadecagon or 19gon 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 6840°.
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
 Eric W. Weisstein, Enneadecagon at MathWorld.
Images for kids
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Enneadecagon Facts for Kids. Kiddle Encyclopedia.