C = 2πR; R = C/2π= 9.452/2*3.14=9,452/6,28=945,2/628=1целая 793/1570
D=2.4; S= πD²/4= 3.14*2,4²/4=3,14*5,76/4=18,0864/4=4,5216
C = 2πR; R = C/2π= 9.452/2*3.14=9,452/6,28=945,2/628=1целая 793/1570
D=2.4; S= πD²/4= 3.14*2,4²/4=3,14*5,76/4=18,0864/4=4,5216