Question

• Find the perimeter of a semi-circle with
radius 2.1 m.​

Answer 1

The Perimeter of a semi circle can be given as-

π*r + D

=22/7*2.1 +4.2

=22*0.3 + 4.2

=6.6+4.2

=10.8 m is the required answer ......

Hope it helps ...

Please mark brainliest

Answer 2

Answer:

$\large\bold\red{10.8\:m}$

Step-by-step explanation:

Given,

A semicircle having,

• Radius, r = 2.1 m

To find the Perimeter,

We know that,

Perimeter of semicircle, p = πr + 2r

Therefore,

Putting the respective values,

We get,

$= > p = \pi \times 2.1 + 2 \times 2.1 \\ \\ = > p = (\frac{22}{7} \times \frac{21}{10}) + 4.2 \\ \\ = > p = \frac{22 \times 3}{10} + 4.2 \\ \\ = > p = \frac{66}{10} + 4.2 \\ \\ = > p = 6.6 + 4.2 \\ \\ = > \bold{p = 10.8 \: m}$