С=2πr=πd , π ≈ 3
1)d=7,4⇒ C=3*7,4=22,2
2)d=3,7⇒ C=3*3,7=11,1
3)d=1,85⇒ C=3*1,85=5,55
4)d=0,37⇒ C=3*0,37=1,11
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С=2πr=πd , π ≈ 3
1)d=7,4⇒ C=3*7,4=22,2
2)d=3,7⇒ C=3*3,7=11,1
3)d=1,85⇒ C=3*1,85=5,55
4)d=0,37⇒ C=3*0,37=1,11