Ответ:
С = πd
d = 56,52 : π = 56,52 : 3,14 =18 ;
r = d : 2 = 18 : 2 = 9 м;
S=π∗r^2= 3.14*81=254.34
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Ответ:
С = πd
d = 56,52 : π = 56,52 : 3,14 =18 ;
r = d : 2 = 18 : 2 = 9 м;
S=π∗r^2= 3.14*81=254.34