Decagon.
A 5 sided figure is called a: pentagon
You only know that all ten interior angles of a 10-sided figure add up to 1,440 degrees.IF the 10-sided figure happens to be REGULAR, then each of them is 144 degrees.
Dodeca-, meaning 2+10, is used in describing any 12-sided figure thus dodecagon
A hexagon.
decagon
A decagon
Decagon
Decagon.
The name of a 10 side polygon is called a decagon
A 10 sided polygon is a decagon.
Icosagon is a 20 sided figure.
The name of a four sided figure (or shape) is called a Square. :)
The name that is given to an 8 sided figure is a octogan.
The name of a 18 sided figure is an octadecagon or octakaidecagon. As you can see the prefix octa- means 8, and deca- means 10. It has 18 sides and 18 vertices,
A 5 sided figure is called a: pentagon
A 15-sided figure is called a pentadecagon.