Don't count me but I'm pretty sure that it's a nonogan.
A shape with 9 sides, is a nonagon.
A nonagon
A nonagon has 9 sides.
Technically, you cannot have a shape having 6 corners and 9 sides because a corner is made with two sides coming together. That's why a shape can have only the amount of corners as sides it has.
The 9-side shape
A nine sided nonagon is only a regular shape if it has 9 equal sides
A 2D shape with 9 sides is called a Nonagon.
A shape with 9 sides is a nonagon. A decagon has 10 sides.
7 sides heptagon 9 sides nonagon
A shape with nine sides is called a nonagon.
-7
A parallelogram, but only if you are counting in base 9.