Предмет: Геометрия, автор: kpjopaa

№1.
Найдите неизвестную сторону треугольника АВС, если:
АВ=11см, АС=8см, ∟А=60°
№2.
Найдите неизвестную сторону треугольника MNP, ели:
MN=7см. MP=15см, ∟M=120°
№3.
Стороны треугольника равны 8см,10см и12см.Найдите косинус угла. лежащего против стороны 8см.

Ответы

Автор ответа: mathkot

Ответ:

1. $\sqrt{97}$ см

2. $\sqrt{379}$ см

3. $\frac{27}{40} = 0,675$

Объяснение:

Смотрите фотографии.

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