Any "irregular" polygon.
The shape that has not got equal side is a rectangle
A square and a rectangle have diagonals of equal lengths
A QUADRILATERAL has four corners and four sides, along with four angles. These do not need to be congruent (equal) but they can be.
Any shape that has not got 4 sides is a non-quadrilateral
Six equal angles and six equal sides means you've got a hexagon there.
A non-descript four sided figure is a quadrilateral.
A Nonagon has nine sides.
A triangle has 3 sides
A polygon with 7 sides is called an heptagon.