Предмет: Геометрия, автор: cooljemkat

Помогите срочноооо 3,4

Приложения:

Ответы

Автор ответа: zvercat14
0

Ответ:

60 дм

Объяснение:

Смотрим на картинку: Видим окружность с центром в точке О. Через нее проведена сторона NM, при чем видим, что и ON, и OM - радиусы, по 13 дм каждый. Следовательно Вся NM  = ON + OM = 13 +13 = 26дм.

Для того чтобы найти периметр, нужно найти сторону KN:

Из т. Пифагора следует, что KN² + KM² = NM²; Подставляем известные:

KN² + 24² = 26²

KN² = 26² - 24²

KN² = (26-24)(26+24)

KN² = 100 ⇒ KN = \sqrt{100} = 10 (дм)

P = KN + KM + NM = 10 + 24 + 26 = 60 (дм)

Второе задание)

S = \frac{1}{2} * CD * AB

S = \frac{1}{2} * 4 * 6 = 12 дм²

Поставьте пожалуйста спасибо


cooljemkat: Спасибо сделай 2 по возможности если не трудно
zvercat14: Хорошо
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