Which of the following is not a polygon ?

Options

A.
B.
C.
D.

Answer

To determine which of the following shapes is not a polygon, we first need to understand what a polygon is.

### Step-by-Step Solution:

1. **Definition of a Polygon**: A polygon is a closed plane figure that is formed by a finite number of straight line segments connected end to end. These segments are called the sides of the polygon.

2. **Characteristics of Polygons**:
- A polygon must have at least three sides.
- The sides must be straight lines.
- The figure must be closed, meaning that the ends of the sides connect to form a shape without any gaps.

3. **Identifying the Options**:
- We need to look at the options provided (not specified in the question but typically would include various shapes) and analyze each one based on the definition and characteristics of polygons.

4. **Evaluating Each Shape**:
- Check if each shape has straight sides.
- Check if each shape is closed.
- Identify if any shape has curves or is open.

5. **Conclusion**:
- The shape that does not meet the criteria of having straight sides or being closed is the one that is not a polygon. For example, if one of the options is a shape with curves (like a circle or a crescent), that shape would not be a polygon.

### Final Answer:
The shape that is not a polygon is the one that has curves or is not closed.

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