Octagon.
dodecagon
A pentagon is a 5 sided, closed figure.
A quadrilateral
impossible?
It is a 1000 sided geometric figure.
polygon
Heptagon - a seven sided two demensional figure
parallelagram: or it can be a sguare or rectangle or trapizoid
A five sided geometric shape is called a pentagon.
A 5 sided pentagon
'PentAgon' means a five sided geometric figure.