Question

find the perimeter of a semicircle whose radius is 12cm​

Answer 1

Step-by-step explanation:

perimeter = 18.86

P =( π r ) / 2

= 22/7 × 12/2

=132/7

=18.86

Answer 2

Given:

The radius of a semicircle is 12 cm.

To find:

The perimeter of a semicircle.

Solution:

The perimeter of a semicircle is 61.714 cm.

To answer this question, we will follow the following steps:

As given, we have,

The radius of a semicircle = 12 cm

Now,

As we know, the circumference or perimeter of a semicircle is given by:

$(\pi \: r)+(2 r)$

So,

The perimeter of a given semicircle

$= ( \frac{22}{7}× 12) + (2 × 12)$

$= (37.714 + 24 cm)$

Hence, the perimeter of a semicircle is 61.714 cm.