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Автор - kcu1

Длина окружности 9.42 м. Найдите радиус и площадь круга, ограниченного этой окружностью. Число  pi =3,14

Ответ

Автор - beijing9
Находим радиус:
L=2pi R;R=frac{L}{2pi}=frac{9,42}{2*3,14}=1,5(m)

Находим площадь круга:
S=pi R^2=3,14*1,5^2=7,065(m^2)

Ответ

Автор - nastasiya98
r=l/2pi=9,42/2pi=1,5
s=pir^2=pi*2,25=7,065

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