Бажожа хорда длина которой 4√2см стягивает дугу окружности градусная мера которой 90°. найдите длину окружности

'more than a club'. it has above all, however,been a symbol of catalan pride.fc barcelona(play)played  (1) its first ever match on 8 december 1899. they (2) 0-1 to a team of british citizens who (lived………….. (3) in  barcelona  at the time. the club moved ………….. (4) several times but (did  not / move)………………) to its present stadium until 1957. the club needed …………… (6) a new stadium because the old one was  not  ………… (7) large enough for the number of supporters going to see matches every week. the new stadium took ……… (8) three and a half years to build. on 24 september 1957, fc barcelona had ……………….(9) their first match against   warsaw. soon, the  barcelonafans gave…….. (10) the stadium its popular catalan nickname, nou camp. on the same day, 27 years later, the club's museum was  opened …….(11). for the first time, all the club's trophies were………) in one place. today, nou camp is the largest stadium in  europe, with room for 98,000 fans

ответ:

16√2

пошаговое объяснение:

1)так как окружность =360 градусов

  360: 90=4

2)1/4 окружности=4√2

3)4√2×4=16√2

(вроде бы так решают,за ответ не ручаюсь)

3 1/2 и 2/7 правильно