(a) As it is not a closed figure, therefore, it is not a polygon.
(b) It is a polygon because it is closed by line segments.
(c) It is not a polygon because it is not made by line segments.
(d) It is not a polygon because it not made only by line segments, it has curved surface also.
Object | Material |
Book | Glass |
Tumbler | Wood |
Chair | Paper |
Toy | Leather |
Shoes | Plastics |