Предмет: Математика, автор: Замокзадумок

В треугольнике АВС угол С равен 90°,угол А равен 45°,ВС=4√2.найдите радиус описанной окружности .

Ответы

Автор ответа: g0ld1337
0
Угол А=45 градусов⇒sinA=BC/Ab⇒AB=BC/sinA=4√2/√2/2=2
R=AB/2=1 Этот вопрос уже был!
Автор ответа: krasilnikovaya
0
АВ^2=4корня из2 ^ 2 + 4корня из2 ^2= 32+32=64
АВ=8
r=4
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Қазақ тiлi, автор: babaevaradima37
Подскажите пожалуйста как это сделать по казахскому языку​
5 лет назад
Предмет: Английский язык, автор: Аноним
Reading Task. Read the article about London police. The History of the London Police In 1700 London had no policemen at all. A few men protected the city streets at night. Many people were poor and there were so many thieves who stole money in the streets that people stayed in their homes as much as possible. In 1750, Henry Fielding started to pay a group of people to stop thieves. They were like policemen and were called 'Bow Street Runners because they worked near Bow Street. Fifty years later, there were 120 Bow Street Runners, but London had become very big and needed more policemen. In 1829, the first London Police Force was started with 3000 officers. Most of the men worked on foot, but a few rode horses. Today, London police are quite well paid and for the few police officers who still ride horses, the pay is even better than for the others. Choose True or False. 1. London didn't need policemen 2. London Police Force was started with 3000 officers 3. In 1800 there were not enough policemen in London 4. All of the first 3000 London Police Force rode horses 5. Today police officers who work with horses are paid more than their colleagues Total [5]​
5 лет назад
Предмет: География, автор: rxn
Выберите верные утверждния (несколько правильных ответов) На границе литосферных плит расположены сейсмические пояса На границе Атлантического океан протянулось "Огненное кольцо". А. Вегенер создал теорию дрейфа материков. Плоскогорье Декан расположено на Южно-Американской платформе​
5 лет назад
Предмет: Математика, автор: Верааааааааа1
(5х+6)^2-(5х-6)^2=12
пожалуйста
9 лет назад
Предмет: Математика, автор: ekaterinasalta
СРОЧНО, ПОМОГИТЕ, ПОЖАЛУЙСТА.
9 лет назад