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около квадрата со стороной 1 описана окружность.найдите ее длину С и длину дуги l . Пожалуйста помогите решить, срочно надо) Буду благодарна!)
Ответы 1
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R = a√2/2 , где R - радиус окружности, описанной около квадрата, а - сторона квадрата.R = √2/2 смС = 2πR = 2π · √2/2 = π√2 смЧтобы найти длину дуги, надо знать ее градусную меру:l = C · α / 360°Например, α = 90°:l = π√2 · 90° / 360° = π√2/4
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Автор:
leilaniuwbl - 5 лет назад
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