The four countries in the Quad (the US, Australia, Japan and India) need to include Vietnam, Indonesia and the Philippines, thereby forming a Heptagonal
Most cells were hexagonal (75%) in shape, with pentagonal (14%) and heptagonal
(11%) cells constituting the greater portion of the remaining corneal endothelium.
The antenna is a circular monopole antenna with a heptagonal
shaped slot cut in it.
At the time, the 50p was the only heptagonal
coin in the world, and according to the Royal Mint, in 2014 there were an estimated 948 million 50p coins in circulation.
Metope (~frons) heptagonal
in frontal view, slightly convex, sharply widest near antennae, abruptly narrowed above compound eyes, with distinct median carina, sublateral carinae absent.
Titled 7, Serra's heptagonal
sculpture is made of seven steel beams, erected at the end of Museum of Islamic Art Park, facing the sea.
Next follows the hexagonal, heptagonal
and octagonal numbers, and finally the general N-agon numbers.