a dodecahedron
piecedecagon
A shape's sides are called faces.
A seven sided shape is called a heptagon or a septagon.......
sedfatserasdfogagon myriagon
A one sided shape (ignoring the poor grammar) is a line. Is that what you wanted?
Myriagon.
piecedecagon
A shape's sides are called faces.
A shape that has 11 sides is called a hendecagon.
icosikaienneagon
A nonagon
An octagon
A nine sided shape is called a nonagon.
a line
Interior angle
icosakaitetragon
A seven sided shape is called a heptagon or a septagon.......