There is no such thing as a 1 sided shape nor a two sided shape.
a one sided shape is called a henagon and a 2 sided shape is called a digon
a 2 sided shape is real but a 1 sided shape is not
Tetringon
Hipintigon
Killigon
a circle
Yes a monogon
Pintigon
1 decillion multiplied by 1 thousand= 1 undecillion 1 decillion multiplied by 1 million= 1 duodecillion Many more are listed in the Wikipedia article "Names of Large Numbers."
a Hecatommyriagon
line