There are infinitely many possible shapes. Apart from a scalene triangle, none have a specific name. They are irregular polygons, but that is not enough. Irregular polygons can have equal sides (if there is at least one angle that is not equal to the rest) or equal angles (if there is at least one side that is not equal to the rest).
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A rhombus is a shape having two acute angles and four equal sides.
No shape has four equal sides and four different angles - either there are two pairs of equal angles, or all four angles are the same; or all sides are not the same length.
A square is a four-sided shape with all sides equal and all angles equal.
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a hexadecagon has 16 sides.