Answer:
c. Concave octagon.
Step-by-step explanation:
We have been given an image of a polygon and we are asked to determine the type of our given polygon.
Upon looking at our given image we can see that it has 8 sides and 8 vertices, so our given polygon is an octagon.
Since it has two angles pointing inward, therefore, our given polygon is an concave octagon and option 'c' is the correct choice.
