1. C=2πR=Dπ. C=5*3,14=15,7 см; C= 1,2*3,14=3,768
2. S=πR². R=D/2=14/2=7. S=3,14*7²=153,86cm²;
R=D/2=2,4/2=1,2. S=3,14*1,2²=4,5216m²;
3. R=С/2π R=25,12/(2*3,14)=4cm
1. C=2πR=Dπ. C=5*3,14=15,7 см; C= 1,2*3,14=3,768
2. S=πR². R=D/2=14/2=7. S=3,14*7²=153,86cm²;
R=D/2=2,4/2=1,2. S=3,14*1,2²=4,5216m²;
3. R=С/2π R=25,12/(2*3,14)=4cm