Предмет: Математика, автор: bayakeel12

найдите угол x=? пж помогите

Приложения:

ГАЗ52: Х=180-(180-80)-(180-160)=60
aarr04594: 1)180°-160°=20°, суміжні; 2)х=80°-20°=60°, властивість зовнішнього кута.

Ответы

Автор ответа: ildar502020
1

Ответ:        60.

Пошаговое объяснение:

Внешний угол равен разности между 180°  и его внутренним углом, смежным с ним.

Теорема о внешнем угле треугольника: Внешний угол треугольника равен сумме двух оставшихся углов треугольника, не смежных с этим внешним углом.

Внутренний угол С треугольника ABC равен 180-80 = 100 градусов

По теореме  160 = A+С;

A=x;

100+x=160;

x=160-100;

x=60.

(См. скриншот )

Приложения:
Автор ответа: quest901
2

смежные углы (сумма должна быть 180⁰):

180⁰ - 80⁰ = 100⁰

180⁰ - 160⁰ = 20⁰

180⁰ - (100⁰ + 20⁰) = 60⁰ (сумма трёх внутреннихуглов треугольника равна 180⁰)

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