Curves

Q. Which of the following is not a simple closed curve?
(A)
(B)
(C)
(D)

Q. The outline of a half moon can be best described as a ____________.

1. closed curve
2. ray
3. line segment
4. circle

Q. Consider the given figure and answer the question:
Is it a curve?

Q.

The outline of a crescent-moon can be best described as a ____.

Q. The given curve is an example of ___________ curve.

1. a closed but not simple
2. a simple and closed
3. an open
4. an open and simple

Q.

$5$ represents a closed curve.

1. True
2. False

Q.

A curve whose starting and end points are same point is called a .................