decagon

• Ein Vieleck mit zehn Seiten und zehn Winkeln.

A polygon that has ten sides and ten angles.

1. Ten-sided polygonB2formal

   A flat shape with ten straight sides and ten angles.

   Zehneck

   • The architect designed a building with a decagon floor plan.
   • A regular decagon has equal sides and equal angles.
   • Students learned to calculate the area of a decagon in geometry class.