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AngelinaSelf
@AngelinaSelf
July 2022
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В треугольнике ABC стороны AB=6см, BC= 3√2 см, угол B=135 градусов. Найти сторону AC
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sandrarich
Квадрат стороны АС = 6² + 3²*2 -2* 6*3*√2*соs(135) = 6² + 3²*2 +2* 6*3*√2*соs(45) =
= 6² + 3²*2 +2* 6*3*√2*(√2/2) = 6² + 3²*2 +2* 6*3 = 36 + 18+36=90
сторона АС = корень(90) = 3* корень(10)
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Answers & Comments
= 6² + 3²*2 +2* 6*3*√2*(√2/2) = 6² + 3²*2 +2* 6*3 = 36 + 18+36=90
сторона АС = корень(90) = 3* корень(10)