Предмет: Математика, автор: trillionors

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Автор ответа: dashkakashka48
1

Ответ:

Судя по рисунку, тр. AOB р/б

Т.к. треугольник AOB р/б, то углы при основании равны =>. угол OBA=OAB=25°

Т.к. сумма углов треугольника равна 180° => угол AOB= 180-25-25=130°

Ответ: AOB= 130°

Автор ответа: ildar502020
1

Ответ: 130°.

Пошаговое объяснение:

Треугольник AOB - равнобедренный OA=OB=R.

Значит углы при основании АВ равны 25°.

Сумма углов в треугольнике равна 180°.  Значит

∠AOB = 180°-2*25°=180°-50°=130°.

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3. What did Mark Twain want to be?
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5. How does the author describe his uncle?
6. How many slaves did Mark Twain's uncle own?
7. What was the author's attitude toward slavery?
8. Was Mark Twain a healthy boy?
9. When did the author start his career of a writer?

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