Предмет: Геометрия, автор: Jessipon

СРОЧНО!!! ДАЮ 50 БАЛОВ​

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Автор ответа: iramazurk
1

Объяснение:

№1

Угол 1 и угол 2 — смежные углы

Сумма смежных углов = 180°

Угол 1 — х°

Угол 2 — 8х°

х + 8х = 180

9х = 180

х = 180 : 9

х = 20

Угол 1 — (х) = 20°

Угол 2 — (8х) = 8 * 20 = 160°

№2

Угол 1 и угол 2 — смежные углы

Сумма смежных углов = 180°

Угол 1 — 4х°

Угол 2 — 5х°

5х + 4х = 180

9х = 180

х = 180 : 9

х = 20

Угол 1 — (4х) = 4 * 20 = 80°

Угол 2 = (5х) = 5 * 20 = 100°

№3

Угол 1 и угол 2 — смежные углы

Сумма смежных углов = 180°

Угол 1 = 70°

Угол 2 = 180° - 70° = 110°

Угол 1 = угол 3 (как вертикальные углы) = 70°

Угол 2 = угол 4 (как вертикальные углы) = 110°

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