11. These arrays are identical decagons that ordinarily cannot be fitted together to cover a surface without gaps. 12. A "'regular skew decagon "'is vertex-transitive with equal edge lengths. 13. The choir was closed with a semi-circular apse, which was encased within a half decagon . 14. Armaggeddon's line-up of products were unveiled at a launch event in Decagon Silver City. 15. A " truncated pentagon, t { 5 }, a quasiregular decagon alternating two types of edges. 16. On top of the decagon sat an oval dome with a lantern, supported from within by six arches. 17. The predictions of the overlapping decagon theory closely match electron-microscope images of the atoms in a real quasicrystal. 18. If all of the diagonals of a regular decagon are drawn, the resulting figure will have exactly 220 regions. 19. Decagon Devices was selected by the Wall Street Journal in 2008 as one of the " Top Small Workplaces ."20. Currently, Decagon designs and manufactures several different types of instruments that are used in both agricultural and food science applications.
