радиус окружности,описанной около правильного треугольника,равен 8 см.найдите радиус - №18938067

радиус окружности,описанной около правильного треугольника,равен 8 см.найдите радиус окружности вписанной в треугольник
- Предмет:
  Алгебра
- Автор:
  colombostevens
- 5 лет назад

Ответы 1

$r=R*cos( \frac{180}{n} ) \\ r=8*cos60=8*0.5=4$
- Автор:
  renatoejln
- 5 лет назад
- 0
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