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GuimellogxD
@GuimellogxD
June 2022
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Вычислите длину стороны треугольника , лежащей против угла, градусная мера которого 135° , а длина двух с\других сторон равны [tex] \sqrt{2} [/tex] сам и 5 см
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potapov19461
Verified answer
По теореме косинусов с² = а² + b² - 2 a*b*cosC =(√2)²+5²-2*√2*5*cos135° =
2 + 25 - 10√2 *(-√2/2 ) = 37.
c = √37≈6,1 см.
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Answers & Comments
Verified answer
По теореме косинусов с² = а² + b² - 2 a*b*cosC =(√2)²+5²-2*√2*5*cos135° =2 + 25 - 10√2 *(-√2/2 ) = 37.
c = √37≈6,1 см.