Предмет: Геометрия, автор: schyzz

По данным рис. 36 определите угол А треугольника АВС.

Помогите пожалуйста!!!

Приложения:

Ответы

Автор ответа: krisbina05

1

abc-трикутник

b-70

c-30

розв'язання

b+c

70+30=100

180-100=80

krisbina05: Как проверит правильно ли решена задача:30+70+80=180

schyzz: спасибо.

Автор ответа: akumyrarin

1

Кут А =80° .Бо заважаючи на малюнок 180° - 70° - 30°= 80° . Сума всіх кутів в трикутнику =180°

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