Chapter 4:

Exercise 4.2

Q1.

Ans.

(a) Open curve

(b) Closed curve

(c) Open curve

(d) Closed curve

(e) Closed curve

Q2. Draw rough diagrams to illustrate the following:

(a) Open curve

(b) Closed curve

Ans.

(a) Open curves:

(b) Closed curves

Q3. Draw any polygon and shade its interior.

Ans.

Q4. Consider the given figure and answer the questions:

(a) Is it a curve?

(b) Is it closed?

Ans.

(a) Yes, it is a curve.

(b) Yes, it is closed.

Q5. Illustrate, if possible, each one of the following with a rough diagram:

(a) A closed curve that is not a polygon.

(b) An open curve made up entirely of line segments.

(c) A polygon with two sides.

Ans.

(a)

(b)

(c) Polygon with two sides cannot be draw.