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How many sides does a circle have?

  1. 2

  2. 4

  3. 0

  4. 1

The correct answer is: 0

A circle does not have sides because it is a smooth and continuous curve without any angles or straight lines. The concept of sides only applies to flat, two-dimensional shapes, whereas a circle is a curved, infinite shape. Option A and B are incorrect because they both represent shapes with flat sides, while option D also does not apply since it refers to a single point. Therefore, C is the only correct answer as a circle does not have any sides.