Question

The area of semi circle 27.72 cm^2 find its perimeter

Answer 1

area of semicircle=1/2πr^2=27.72
1/2×22/7×r^2=27.72
r^2=27.72×7×2/22=17.64
r=√17.64
r=4.2cm

perimeter of semicircle=πr=22/7×4.2
=13.2 cm

hope it helps u if yeah plz mark it as brainliest

Answer 2

since,
(πr^2)/2=27.72
πr^2=27.72*2
r^2=(27.72*2*7)/22
=27.72*7/11
=2.52*7
=17.64cm^2
r =√(17.64)
=4.2
perimeter=πr
= (22/7)*4.2
=22*0.6
=13.2cm



thank you