Most shapes do not have equal sides. In nature, shapes with equal sides are the exception rather than the rule.
Any "irregular" polygon.
The shape that has not got equal side is a rectangle
semi circle
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
hexagon
Well, honey, what you've got there is a rectangle. It's got those four right angles and those two pairs of equal sides, making it a classic shape in the geometry world. So, if you're looking for a shape that fits that description, you've hit the nail on the head with a rectangle.