Answer:
Assuming that HJI is semicircle of Circle O having radius =12 inches , exact length of semicircle HJI = 61.71 inches correct up to two decimal place.
Step-by-step explanation:
Assuming that HJI is semicircle of Circle O having radius =12 inches.
exact length of semicircle = perimeter of semicircle = half of circumference of circle + diameter of circle
half of circumference of circle = 1/2(2πr) = πr [ where π=22/7 and r is radius ]
diameter of circle = 2r
⇒exact length of required semicircle = πr+2r=r(π+2) = 12((22/7)+2) since radius is 12 inches.
⇒exact length of required semicircle = 61.71 inches
