Define the terms:

i. Open curve

ii. Closed curve

iii. Simple closed curve

(i) Open Curve – Curves whose beginning and end points are different are called as Open Curve.

Begin Point

End Point

(ii) Closed Curve – Curves whose beginning and end points are same but crosses itself are called as Closed Curve.

(iii) Simple Closed Curve – Curves whose beginning and end points are same and does not cross itself are called as Simple Closed Curve.