Question

find the area of semi circle , if the perimeter of semi circle is 36 cm (use 22/7 )​

Answer 1

Answer:

Hi,

Let the radius of a semicircle = r cm

Perimeter of the semicircle = mr+ 2r

P = 36

r( T + 2) = 36

r( 22/7 + 2 ) = 36

r( 22 + 14 )/7

(36/7)r = 36

r = ( 36 x 7 )/36

r = 7 cm

Area of the semicircle = n r?/2

A = ( 22/7 ) x 7 × 7/2

A = ( 22 x 7) /2

A = 11 x 7

A = 77 cm?

I hope this helps you.