Предмет: Геометрия, автор: makeevartem67

Помогите пожалуйста не могу понять (​

Приложения:

tetamotatetyamotya: <1=126°

Ответы

Автор ответа: NanadaimeHokage
0

Ответ:

3)∠1=126°

Объяснение:

1) Предположим, что вариант 1 правильный. Но тогда ∠2+∠3=108°, а должно быть 180, т.к. они смежные.

2)Предположим, что верен 2 вариант. ∠3 и ∠4 они накрест лежащие , т.е. ∠4=54°. но тогда ∠1+∠4=108°, а должно быть 180°, т к. они смежные. Значит, второй вариант неверный .

3)Допустим, 4 вариант нас устраивает. Но тогда ∠4≠∠3, а значит а не параллельно b. Это противоречит условию. 4 тоже неверно

4) Рассмотрим 3 вариант. Если ∠1=126°, а ∠3=∠4=54° , то. тогда выполняется равенство: 44°+126°=180°. т.к. 1 и 4 смежные. Этот вариант подходит.

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