Предмет: Геометрия, автор: 19Asya

стороы параллелограмма равны 8 корней из 2 и 7, а острвй ушол равен 45 градусов. найти большую диагональ параллелограмма

Ответы

Автор ответа: Okiagari

Теорема косинусов
с^2=а^2+в^2-2ав*cos @
c^2= (8корней из 2)^2+7^2-2*7*8корней из 2*cos45
cos 45= корень из 2/2
с^2=64
Ответ 8

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