polygon
A simple closed figure formed by three or more straight segments
pentagon
A polygon having five sides
hexagon
A polygon having six sides
heptagon
A polygon having seven sides
octagon
A polygon having eight sides
nonagon
A polygon having nine sides
decagon
A polygon having ten sides
equilateral
In a polygon, all of the sides are congruent
equiangular
In a polygon, all of the angles are congruent
regular polygon
A polygon that has all sides congruent and all angles congruent