Let’s analyze the image and identify the names of the polygons:

Explanation:

• Polygon naming depends on the number of sides and whether the shape is convex or concave. Here's the analysis:

1. a) The polygon has 7 sides.

   • Name: Heptagon (a convex shape with seven sides).

2. b) The polygon has 9 sides.

   • Name: Nonagon (a convex shape with nine sides).

3. c) This polygon has 5 sides, but it is concave (one angle points inward).

   • Name: Concave Pentagon.

4. d) This polygon has 6 sides and is also concave.

   • Name: Concave Hexagon.

Would you like further clarification or details on polygons?

5 Related Questions:

1. What is the difference between convex and concave polygons?
2. How do you calculate the sum of the interior angles of a polygon?
3. What are some real-world examples of polygons?
4. How can you classify a polygon by symmetry?
5. What are regular vs. irregular polygons?

Tip:

For any polygon, the formula for the sum of interior angles is $(n-2) \times 180°$, where $n$ is the number of sides.