it is called a nonagon
dodecagon
Yes an octagon is an 8 sided polygon
A 9 sided polygon is a nonagon
A 9 sided polygon is a nonagon
this is called a nonagon
A nonagon has 9 sides
A 7 sided pyramid would be called a heptahedral or heptahedron.
a nonagon
nonagon
A nonagon
A nonagon
nonahedron