It is quite acceptable to call it a 140-agon but what's more important is knowing how to work out its properties.
a 4 sided shape is called a quadrilateral
== == A 56 sided shape is called a Pentacontakaihexagon.
A 600-sided shape is a hexcosiagon.
A twelve sided shape is a dodecagon.
A five sided 3d shape is called a pentehedron
it is called a seven sided shape in Canada
a one sided shape is called a henagon and a 2 sided shape is called a digon
A 10-sided shape is called a decagon.
An five sided shape is called a Pentagon
A 150 sided shape is called heptaconta.
Hommasquabblelagagon
The 22 sided shape is called a: ICOSIKAIDIGON
A five-sided shape is called a pentagon.
A 128-sided shape is called a hecatoicosioctagon.
a 69 sided shape is called a sexagon
A 90 sided shape is called Enneacontagon.
A 35 sided shape is called a triacontakaipentagon