The diagram on the left shows how to find the centroid of a semicircle. Use this diagram to locate the centroid for the semicircular cylinder shown on the right. Use the system of axis with the origin located at the back corner, as show in the figure. Make sure to enter the correct sign (+ or -) with your answer. YG CG y 30 mm r 90 mm YG = 4r ЗП XG YG ZG = mm = = mm mm N