Предмет: Геометрия, автор: 4maxchanell

Используя теорему о внешнем угле треугольника, найдите угол А ΔАВС.

Приложения:

Ответы

Автор ответа: Пеппер

Ответ:

47°

Объяснение:

Внешний угол треугольника равен сумме двух внутренних углов, не смежных с ним.

145=7х+28+3х+17

10х=100

х=10

∠А=3*10+17=47°

damirkaztaj68: мне бы 4 вариант

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