What is a six sided figure called?

Answer 1

If the sides are all equal, and opposite sides are parallel, then the angles are all equal (72º) and it is a 'regular hexagon'.

A six sided plane figure is called a hexagon, as "hex" means "six."

Answer 2

A closed six-sided figure has also six angles and it's therefore called a hexagon, from the Greek hex meaning six and gonia meaning angle.

A pentagon has 5 angles/sides, a heptagon 7 angles/sides, an octagon 8 angles/sides, a nonagon (also ennaeagon) has 9 angles/sides and a decagon has 10 angles/sides...