Предмет: Геометрия, автор: ilonakure4ko

ДУЖЕ ТРЕБА ! Відомо, що дві паралельні прямі перетинанає січна.

Якщо кут 5 = 120* , то кут 1 = ?*

Приложения:

Ответы

Автор ответа: egor2009zolozhckov
1

Ответ:

Теж буде 120°

1) спосіб, сума односторонніх кутів 180°, кут 5 і кут 2, односторонні, 180-120=60°, сума суміжних кутів 180°, кут 1 та кут 2, суміжні, 180-60=120 кут1 120

спосіб 2

відповідні кути рівні, кут 5 та кут 1 відповідні, вони рівні,120=120

Спосіб 3 ,

кут 5 та 4 різносторонні, вони рівні кут 5=кут4=120

кут 4 та кут 1 вертикальні, вони рівні, тому теж 120

Объяснение: за всима 3 способами доведено, що кут 1=120°

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Holiday time was near now, and we, that is, Harris and George and I met to discuss our plans. Harris said
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usually do," George said, "I think we'll let you go swimming not more than once in three or four days. If you go
swimming every day, we'll never have enough food for you. We won't be able to carry so much in the boat. "
So we discussed the food question. "Begin with breakfast," George said. "For breakfast we must have a tea-
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We agreed. Cheese in a boat in summer, little by little becomes the master of all the food. You may think
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