A square or a rectangle.
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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
A rectangle. The opposite sides at least must be equal if all four angles are 90o.
Rectangle
A polygon with 4 sides has 4 angles. All polyhedra have at least 4 vertices so I cannot think of any shape that meets the requirements.