Предмет: Геометрия, автор: artemart455

Пожалуйста решите 2 задачи по геометрии за 7 класс, прошу срочно!!!​
Найдите параллельные прямые и докадите их параллельность.

Приложения:

artemart455: сможете?
RendiDIE: да
RendiDIE: Но какой угол нужно найти
artemart455: нужно найти параллельные прямые и доказать их параллельность
artemart455: ну как? получается?
artemart455: спасибо вам
artemart455: это правильное решение?
RendiDIE: Да
artemart455: Спасибо большое
artemart455: 5 звезд

Ответы

Автор ответа: RendiDIE
1

Ответ:

1)

180° - 40° = 140° градусов

140° = 140° - накрест лежащие углы => d || e

2)

треуг. ABO и CDO равны по 1 признаку=> угол ABO = углу ODC=> AB || CD

-

треуг. BOC и AOD равны по 1 признаку=> угол CBO = углу ADO=> BC || AD

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