A curve can be classified into two categories, an open curve or a closed curve.

Video Examples: Gradient of curve

Example of Curve

Figure 1 is a closed curve and Figure 2 is an open curve.

Solved Example on Curve

Ques: Which of the following is an open curve?

Choices:

A. circle
B. ellipse
C. parabola
D. none of the above
Correct Answer: C

Solution:

Step 1: In an open curve starting and end points are different.
Step 2: Here, parabola has different end points.
Step 3: So, parabola is an open curve.