An enneadecagon (or enneakaidecagon or nonadecagon).
If it is a 2 dimentional shape it is called an 'octadecagon'
A nineteen-sided regular polygon is called an enneadecagon.
A five sided 3d shape is called a pentehedron
A nineteen sided polygon is called a Nonadecagon or an Enneadecagon.
it is called a seven sided shape in Canada
The 22 sided shape is called a: ICOSIKAIDIGON
Hommasquabblelagagon
A 90 sided shape is called Enneacontagon.
A five-sided shape is called a pentagon.
a 4 sided shape is called a quadrilateral
A seven sided shape is called a heptagon.
A 128-sided shape is called a hecatoicosioctagon.