Предмет: Геометрия, автор: pogrebickijmaksim0

У трикутнику ABC: дві сторони дорівнюють √2 см. та 8 см. , кут А між ними дорівнює 135° Знайти третю сторону трикутника і його периметр.​

Ответы

Автор ответа: samusevgeniya
0

Ответ:

Объяснение:

За теоремою косинусів: a^{2} = 8^{2} +(\sqrt{2} )^{2} - 2 *8*\sqrt{2} c0s 135

a^{2}=66+16=82

a=\sqrt{82}

P=8+\sqrt{2}+\sqrt{82}

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