Предмет: Геометрия, автор: gorobchenkolera949

ПОМОГИТЕ СРОЧНО!
Знайдіть площу кільця розміщеного між двома концентричними колами радіуси яких дорівнюють 4 см і 6 см
(решение с рисунком задачи)

Ответы

Автор ответа: zinovicgrigorij
7

Ответ: 20π

Объяснение: для нахождения площади кольца надо из площади большого круга вычесть площадь малого круга:

Sкольца=πR²-πr²=π(R²-r²)=π(36-16)=20π.

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