Площадь большого шара = 4п^2. найти площадь поверхности шара.
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07.07.2019 21:00
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Sкруга=πR²
большой круг шара- диаметральное сечение.
4π²=πR², R²=4/π
S шара=4πR²
S=4π*(4/π)
Sшара=16