Предмет: Геометрия, автор: yaroshanya11

Помогите пожалуйста ето самостоялка

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Автор ответа: qq0o

Ответ:

<А та <В-внутрішні односторонні. <А+<В=130+50=180°, це свідчить про те що ВС || АД. тоді якщо кут Д=60°, а сума внутрішніх односторонніх кутів 180°, отже з цього випливає що кут С=180-60=120°

Відповідь: 120°

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