Предмет: Геометрия, автор: ivanlomakin37

Виконайте завдання за готовим рисунком. У відповідь запишіть тільки числа в квадраті через кому (без пробілу). СРОЧНООООООО ПОЖАЛУСТА ​

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Ответы

Автор ответа: radkevich2009
0

Ответ:

AB = 13

Объяснение:

Сума кутів трикутника дорівнює 180°

angle C=180^ - angle A- angle B = 180 deg - 50 deg - 85 deg =

= 45 deg

теорема косинусів:

AB^ 2 = A * C ^ 2 + C * B ^ 2 -2^ * AC^ * CB^ * cos 45^

cos 45 deg = sqrt(2) / 2

AB^ 2 = 5 ^ 2 + (sqrt(8)) ^ 2 -2^ * 5^ * sqrt 8^ * /2/2=

=25+8.5^ * 4 = 13

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