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sveta20102120
@sveta20102120
June 2022
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Площадь круга 49 Пи см2 .Найдите длину окружности,ограничивающей данный круг.
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Answers & Comments
ladislaoisaev
S=πr²
r²=S/π
r=√(S/π)
r=√(49π/π)=√49=7см
L=2πr=2π*7=14π см
0 votes
Thanks 9
sveta20102120
а можно ещё условие?
ndusha
Verified answer
S = Pi*R^²
49*Pi = Pi*R²
R=7
L=2*Pi*R=2*3,14*7=43,96
2 votes
Thanks 6
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Answers & Comments
r²=S/π
r=√(S/π)
r=√(49π/π)=√49=7см
L=2πr=2π*7=14π см
Verified answer
S = Pi*R^²49*Pi = Pi*R²
R=7
L=2*Pi*R=2*3,14*7=43,96