How do you remember that a hexagon is a hexagon?

because it has six sides and six corners

I don't know, can I?

any shape with 6 sides

A Hexagon is a shape with 6 sidesalso. ..Triangle - 3 sidesRectangle, square etc. - 4 sidesPentagon - 5 sidesHexagon - 6 sidesHeptagon - 7 sidesOctagon - 8 sidesHope this was helpful

I'm assuming you're talking about the regular polygon with one more side than a hexagon... It's called a Heptagon, from the ancient Greek word "Hepta", meaning seven. Hope this helps.