Question

Find radius of semi circle of its perimeter is 18cm

Answer 1

1*22*r^2/7*2=18
r^2=198/7
22*r/7(find valud of r n place in d given aside formula)

Answer 2

Hey,

› The perimeter of a semicircle is =

> (Pi)r+2r where r is the radius of the semicircle.
› Here, r[(Pi) + 2] = 18, or

r = 18/[(Pi) + 2]

Or r = 3.5

› Hope it helps!