Предмет: Математика, автор: vikabuldenko021

довжина кола дорівнює 22п дм. Знайдіть площу круга, обмеженого цим колом
Будь ласка дуже треба


jekadva: =121п дм² площа круга

Ответы

Автор ответа: natalyabryukhova
2

Ответ:

Площадь круга равна 121π дм².

Пошаговое объяснение:

Длина окружности равна 22π дм. Найдите площадь круга, ограниченного этой окружностью.

Дано: С = 22π дм - длина окржности.

Найти: S круга.

Решение:

Формула площади круга:

S = πR²

Надо найти R.

Известно, что длина окружности C = 22π дм.

Формула длины окружности:

С = 2πR

Подставим значение С и найдем R:

22π = 2πR   ⇒  R = 11 (дм)

Можем найти площадь круга:

S круга = π · 11² = 121π (дм²)

Площадь круга равна 121π дм².

#SPJ1

Похожие вопросы
Предмет: Английский язык, автор: k6411852
!!! СРОЧНО!!! АНГЛИЙСКИЙ! 8 КЛАСС! London London is the capital of Great Britain, its political, economic and commercial centre. It is one of the largest cities in the world and the largest city in Europe. Its population is about eight million people. London is divided into the following parts: the City Westminster, the West End, and the East End." The heart of London is the City, its financial and busi- ness centre. A lot of banks, offices and companies are situated there. As Englishmen say, they "make money" in the City. One million of people come to this part of London to work. There are some famous ancient buildings in the City. The most impressive one is the St. Paul's Cathedral, the greatest of English churches. It was built in the 17th century by Sir Christopher Wren. The Tower of Lon don was founded by Julius Caesar and in 1066 rebuilt by William the Conqueror. It was used as a fortress. a royal palace, and a prison. Now it is a museum. Westminster is the governmental part of London. Nearly all English kings and queens have been crowned in Westminster Abbey. Across the road from Westmin- ster Abbey is Westminster Palace, the seat of the British Parliament. The clock tower of the Houses of Parliament) is famous for its big bell, known as Big Ben. The West End is the richest part of London. It is a symbol of wealth. The best hotels, restaurants and shops can be found there. The biggest museum in London is the British Mu- seum, situated not far from the Trafalgar Square. In the East End there are a lot of factories, work- shops and docks where working people live.​