Предмет: Математика, автор: Аноним

Найдите длину окружности и площадь круга радиуса 20 см

ПОЖАЛУЙСТА ПОМОГИТЕ!!! дам 10 баллов

Ответы

Автор ответа: NataVlk
2

Ответ:

Пошаговое объяснение:

Дано:

r=20cм

C-длина окружности-?см

А-площадь круга-?см^2

Пи(пишется спец буквой) =3,14

С=2пиr

C=2×3,14×20=125,6см-длина окружности

А=пи r^2

A=3,14×20^2=3,14×400=1256см^2-площадь круга

Ответ: Длина окружности-125,6см

Площадь круга-1256см^2

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Добавлено 2 года назад
One day Petey, who was a puppy, said to his mother, who was a dog:" I'd like a boy for Christmas".
His mother said she thought he could have a boy if he was a very good puppy.
So the day before Christmas Petey's mother asked: " have your been a very good puppy?"
" Oh, yes!" said Petey. "I didn't frighten the cat."
"you didn't?" asked Petey's mother.
"Well,I just frightened her a little," said Petey. " And I didn't chew any shoes."
" Not any?" said his mother.
"Just
a teeny-weeny chew", said petey. " And I remembered - well you have
been a good little dog. I will go out and get your a boy for Christmas".

But when Petey's mother came back she looked very worried. "How
world you like a soft white rabbit with pink ears for Cristmas?" she
said to Petey.
"No, thanks," said Petey.
"Don't you want a lovely canary?"
"I'd like a boy," said Petey.
"How about some little fish?" said Petey's mother.
" i just want a boy," said Petey.
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