Basic Geometrical Ideas-Solutions Ex-4.2

CBSE Class –VI Mathematics
NCERT Solutions
Chapter 4 
Basic Geometrical Ideas (Ex. 4.2)

Question 1. Classify the following curves as (i) Open or (ii) Closed.

Answer: (a) Open curve
(b) Closed curve
(c) Open curve
(d) Closed curve
(e) Closed curve
Question 2. Draw rough diagrams to illustrate the following:
(a) Open curve
(b) Closed curve
Answer:  Open curves:

Closed curves
Question 3. Draw any polygon and shade its interior.
Answer: Polygon ABCDEF

Question 4. Consider the given figure and answer the questions:
(a) Is it a curve?
(b) Is it closed?

Answer: (a) No, it is not a curve.
(b) No, it is not closed.
Question 5. 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.
Answer: (a) 
(c) Polygon with two sides cannot be draw.