question_answer 7)

Classify the following curves as (i) open or (ii) closed. TIPS A simple curve is one, that does not cross itself. Besides, when the ends of a curve are joined, it is called a closed curve. If its ends are not joined, it is called an open curve.

Answer:

Now, from the figure, (a) and (c) are open curves and (b), (d) and (e) are closed curves.