NCERT Solutions – Class 6 Maths Basic Geometrical Ideas Exercise 4.2

# NCERT Solutions – Class 6 Maths Basic Geometrical Ideas Exercise 4.2

## NCERT Solutions – Basic Geometrical Ideas

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### Exercise 4.2

Ex 4.2 Class 6 Maths Question 1.
Classify the following curves as (i) open or (ii) closed. Solution:
(a) Open curve
(b) Closed curve
(c) Open curve
(d) Closed curve

Ex 4.2 Class 6 Maths Question 2.
Draw rough diagrams to illustrate the following:
(a) Open curve
(b) Closed curve
Solution: Ex 4.2 Class 6 Maths Question 3.
Solution:
ABCD is the required polygon whose interior region is shaded. Ex 4.2 Class 6 Maths Question 4.
Consider the given figure and answer the questions.
(a) Is it a curve?
(b) Is it closed? Solution:
(a) Yes, it is a curve.
(b) Yes, it is closed curve.

Ex 4.2 Class 6 Maths 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.
Solution:
(a) Required closed curve is a circle.
(b) ABCD is an open curve made up of the line segments $$\overline { AB }$$, $$\overline { BC }$$ and $$\overline { CD }$$ .
(c) A polygon with two sides is not possible.
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