длина окружности, вписанной в правильный треугольник равна 2 корня из 3 пи см. найдите длину окружности, описанной около этого треугольника.

помогите, пожалуйста)

 

Задание 9. Заполните пропуски словами much, many, few и
little:

1)            He isn’t very popular. He has
________ friends.

2)            Ann is very busy these days. She has
_______ free time.

3)            Did you take ________ photographs
when you were on holiday?

4)            I’m not very busy today. I haven’t
got ________ to do.

5)            The museum was very crowded. There
were too ________ people.

6)            Most of the town is modern. There
are ________ old buildings.

7)            The weather has been very dry
recently. We’ve had ________ rain.