Question

Define each of the following:
(a) Closed figures
(b) Open figures
(c) Polygons

Answer 1

(i) A closed figure is a figure that can be traced with the same starting and ending points, and that too without crossing or retracing any part of the figure.
For example: Polygon, circle, etc.

(ii) A figure having no boundary and no starting or ending points is called as an open figure.

(iii) A polygon is a plane shape with 3 or more straight sides. It is a 2 dimensional closed figure.