Предмет: Геометрия, автор: ademamarabayeva1

пожалуйста, очень нужно

AB касательная к окружности с центром в точке O. OB- радиус,
проведенный в точку касания. Определите вид ∆AOB. ∟OAB = 300 , диаметр
окружности 10см. Найдите OA.

Приложения:

ademamarabayeva1: там 30 граудусов

Ответы

Автор ответа: LN330068

Ответ:Если у вас нет значка «градусы»,то пишите слово буквами,а то в задании угол равен 300 градусов!!

Решение

Радиус ОВ является перпендикуляром к касательной АВ,поэтому

<АВО=90 градусов,а треугольник прямоугольный

Радиус ОВ равен половине диаметра

ОВ=10:2=5 см

По условию задачи угол ОАВ равен 30 градусов,катет ОВ лежит против этого угла,а значит равен половине гипотенузы,следовательно

ОА=5•2=10 см

Объяснение:

ademamarabayeva1: извиняюсь, за ошибку там 30°

ademamarabayeva1: спасибо огромное, вы спасли мне мою шкуру

LN330068: Задача легкая

LN330068: удачи

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