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Mensuration Exercise 20.1 Class 6 Notes | EduRev

Class 6 : Mensuration Exercise 20.1 Class 6 Notes | EduRev

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1. Which of the following are closed curves? Which of them are simple?

Solution:

The figures (ii), (iii), (iv), (vi) and (vii) are closed curves and the figures (ii), (iii), (iv) and (vi) are simple closed
curves.

2. Define perimeter of a closed figure.
Solution:

The length of the boundary of a closed figure is known as its perimeter.

3. Find the perimeter of each of the following shapes:

Solution:

We know that perimeter is the sum of lengths of all the sides of a closed figure.

(i) Perimeter of the given figure = 4 + 2 + 1 + 5 = 12 cm

(ii) Perimeter of the given figure = 23 + 35 + 40 + 35 = 133 cm

(iii) Perimeter of the given figure = 15 + 15 + 15 + 15 = 60 cm

(iv) Perimeter of the given figure = 3 + 3 + 3 + 3 + 3 = 15 cm

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Mathematics (Maths) Class 6

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