Circle o has a radius of 12 inches find the exact length of semicircle hji

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

7. 153.86 ft

8. 12.56 ft

9. 78.5 m

10. 379.94 in

11. 132.665 m

12. 12.56 yd

13. 226.865 ft

14. 113.04 ft

15. 63.585 ft

16. 254.34 m

17. 50.24 cm

step-by-step explanation:

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2? if not the correct answer you might need to provide more information

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