A generic name would be a quadrilateral, but specific shapes include:
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A shape with 4 sides is a quadrilateral
Names for shapes that have equal sides are called EQUILATERAL.
A quadrangle or quadrilateral (a shape with 4 angles or 4 sides, respectively). Special names normally come in when you DO have special characteristics, not when you don't.
Pentagon
Any shape that has 4 sides is a quadrilateral