Предмет: Геометрия, автор: nysnaz

помогите. радиус окружности равен 1 см. на протяжении радиуса взята точка C, отстоящая от центра окружности на расстоянии 3 см. через точку C проведён Луч, пересекающий окружность в точках A и B. Найдите произведение отрезков AC и BC.
А) 4
B) 6
C) 8
D)12

Приложения:

Ответы

Автор ответа: 68tata
1

Ответ: C) 8


Дано : Окружность, R=1 см, СО=3 см,

Найти: АС*ВС-?
Решение:
АС= СО-АО=СО-R=3 cм-1 см=2 см
ВС=СО+ОВ=СО+R=3см+1см=4  см
АС*ВС=2 см*4 см=8 см²

Приложения:

nysnaz: раха братщка
nysnaz: а почему 8 квадратных см?
68tata: когда умножаешь сантиметр на сантиметр получаешь квадратній сантиметр
nysnaz: а все понял, хорошо
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