Question

find the perimeter of semicircle whose diameter is .a)14m

pls it's very urgent give answer pls will mark as brain list​

Answer 1

Answer :

The perimeter of semicircle is 36m.

Explanation :

We are given with a semicircle as well as diameter of that semicircle, that is,

Diameter, d = 14m.

We have to find out the perimeter of semicircle if the diameter of semicircle 14m.

Given that the diameter of a semicircle is 14m, at first we need to find out the radius of a semicircle, after that we can easily find out the perimeter of semicircle.

We know that, if we are given with semicircle and diameter of that semicircle, we have the required formula, which says,

→ D = 2r

Where we have the values as :

D = 14m.

r = unknown.

By using the formula and substituting the given values in the formula, we get :

→ 14 = 2r

→ r = 14/2

→ r = 7

Now we have also a radius of semicircle, now we can easily calculate the perimeter of semicircle.

We know that, if we are given with semicircle and radius of that semicircle, we have the required formula, which says,

→ Perimeter = πr + 2r

Where we have the values as :

Perimeter = Unknown.

r = 7m.

By using the formula and substituting the given values in the formula, we get :

→ Perimeter = [(22/7 × 7) + (2 × 7)]

→ Perimeter = 22 + 2 × 7

→ Perimeter = 22 + 14

→ Perimeter = 36

Hence, the perimeter of semicircle is 36m.

Answer 2

p= 2πr/2

7× 3.14= 21.98

hope it helps you my friend