Question

circumference of circle is 22cm find its area of semi circle​

Answer 1

Explanation:

2πr=22

2×22/7×r=22

r=22×7/2×22

7/2 =3.5

now area =πr^2

22/7×3.5×3.5

38.5cm^2

area of semi circle= area of circle /2= 19.25

Answer 2

Answer:19.25cm2

Explanation:

Given,

2 pi r = 22

Pi r = 11

R = 11×7/22

R = 3.5cm

To find,

Area of semicircle =1/2× pi × r × r

=1/2×22/7×3.5×3.5

=38.5/2

=19.5 cm2