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E:\Working\Focus_Learning\Math_Genius_4_(25-10-2023)\Open_Files\Chap-11
\\December 6, 2023 1:01 PM Bharat Arora P-6 Reader _________________________ Date: ___________________74

Look at the adjoining figure, P
To find the perimeter of such figures, we need a string and a ruler.

Step 1: Start from a point, say P on the curved boundary and put
a string around the boundary till you come back to the
starting point.

Step 2: Measure the length of the string with a
ruler. The total length of the string along activity
this boundary gives the perimeter of the Take a bangle of your

curved figure. mother and find its perimeter

using a piece of thread and a
0 cm 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ruler. What is the perimeter of

0 1 2 3 4 5 6 the bangle? ________________

Practice time 11a

1. Find the perimeter of each of the following figure by counting unit length of
squares.

(a) (b) (c)

(d) (e) (f)

2. Find the perimeter of the given figures:
(a) (b) 8 cm (c) 4 cm

5 cm 6 cm 5 cm 5 cm

8 cm 4 cm 4 cm
8 cm
4 cm

(d) 9 m C (e) A 5 cm B (f) B 6 cm C
D 7 m 4 cm 3 cm 4 cm 3 cm
C
5 m 3 cm F D
A 10 m B E 5 cm D A 3 cm 4 cm 5 cm

F

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