Предмет: Математика, автор: mirabellachka11

4. Радіуси двох кіл дорівнюють 2,1 см і 2,6 см, а відстань між їх центрами становить
7,2 см. Визнач взаємне розміщення цих кіл. (1 бал)
A Не перетинаються;
Б перетинаються в одній точці;
в перетинаються у двох точках. СРОЧНО


katekhmelnitskaya: ребята пожалуйста помогите

Ответы

Автор ответа: ReMiDa
2

Ответ:

A) Не перетинаються;

Пошаговое объяснение:

Радіуси двох кіл дорівнюють 2,1 см і 2,6 см, а відстань між їх центрами становить 7,2 см. Визнач взаємне розміщення цих кіл. A) Не перетинаються;Б) перетинаються в одній точці;В) перетинаються у двох точках.

Розглянемо два кола, центри якіх точки O_1 \:  \:  \: i \:  \:  \: O_2, a радіуси відповідно r_1 \:  \:  \: i \:  \:  \: r_2.

r_1 = 2,1 (см)

r_2=2,6 (см)

 O_1O_2=7,2 (см)

r_1+r_2=2,1 + 2,6 = 4,7 \\  \\ 7,2>4,7 \\  \\\bf  O_1O_2>r_1+r_2

⇒ кола не перетинаються.

#SPJ1

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