Question

Find the perimeter of following figures.
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Answer 1

Answer:

3 a. Given:- diameter = 21m

So, radius = 21/2 = 10.5m

Now, Perimeter of a semi-circle = radius×(π+2)

= 10.5 × (22/7 + 2)

= 10.5 × (22+14/7)

= 10.5 × (36/7)

= 1.5 × 36

= 54m

Hope this helps u..✌️

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Answer 2

Answer:

3)a. Given- diameter = 21

so radius=21/2=10.5m

Now primeter of a semi-circle

=10.5×(22/7+2)