Kinelski, R=17 D=8 r^2=R^2−d^2 r^2=289-64 r^2=225 r=15 15 см The post was merged to previous May 7, 2021 Kinelski, 1. Sпов = 4πR² Sпов=4П*144=576П The post was merged to previous May 7, 2021 Kinelski, S поверхности сферы = 4πR² = 1444П см² D = 2R 1444π = 4πR² R = 19 см D = 2R = 19*2 = 3 8 см