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The given figure is a polygon because it is a closed figure made up of straight line segments.

Next, we need to determine whether it is concave or convex:

- **Convex Polygon**: All interior angles are less than 180°, and no line segment between any two points of the polygon passes outside of it.
- **Concave Polygon**: At least one interior angle is greater than 180°, and a line segment between two points of the polygon can pass outside the polygon.

In this case, the polygon has an angle greater than 180°, as indicated by the inward "dent" in the figure. Therefore, the polygon is **concave**.

### Answer:  
- **Concave polygon**

Would you like further explanation or have any questions?

Here are 5 follow-up questions based on this topic:
1. What is the difference between concave and convex polygons?
2. Can a polygon with all equal sides and angles be concave?
3. How do you calculate the sum of interior angles of any polygon?
4. What is the minimum number of sides a polygon must have to be concave?
5. Can a triangle ever be concave?

**Tip:** For any polygon, if you can draw at least one diagonal that lies outside the polygon, it is concave!

Determine whether or not the figure is a polygon. If it is a polygon, decide if it is concave or convex.

Determine if the given figure is a polygon and identify whether it is concave or convex. Explore key concepts of polygons, including the difference between concave and convex shapes. Suitable for Grades 6-8 geometry.

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