Предмет: Геометрия, автор: foxsshcool

Срочно!!! Пожалуйста решите

Приложения:

Ответы

Автор ответа: zmeura1204

Ответ:
МN=13 ед

Решение:
Теорема косинусов:
МN=√(MK²+NK²-2*MK*NK*cos∠K);
cos60°=½
MN=√(15²+7²-2*15*7*½)=
=√(225+49-105)=√169=13ед

Oksana2456: Допоможи з контрольною будь ласка

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