In the following question, four words have been given, out of which three are alike in some manner and the fourth one is different. Choose the odd one out.
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Focus on the properties of the shapes when solving such problems. Polygons have straight sides, while circles are curved.
"Triangle", "Rectangle", and "Square" are all polygons (shapes with straight sides).
"Circle" is not a polygon, as it has a curved boundary, not straight sides.
Therefore, the odd one out is "Circle." Conclusion: The odd one out is (3) Circle.