Question

find area of semicircle whose circumference is 18 centimetre​

Answer 1

Answer:

Circumference of semicircle= pi r

18=22/7 r

18×7÷22=r

63/11=r

Area of semicircle =pi r^2

=22/7 (63/11)^2

=22/7×63/11×63/11

=18×63/11

=103.01 m sq.

please mark me as brainlist.

Answer 2

Answer:

567/11 sq.cm

Step-by-step explanation:

circumference of semi circle= pi.r

given circumference = 18 cm

=> 18 = pi.r

18= 22/7. r

thus r= 63/11

area of semi circle = (pi.r.r.)/2

area= 22/7 . 63/11 . 63/11 . 1/2

= 567/11 sq.cm