Предмет: Геометрия, автор: Серёжа0123

на рисунке 2 хорды AC, CD и DB равны радиусу окружности с центром в точке O. Диаметр окружности равен 16 см. найдите периметр четырёх угольника ACDB.

Приложения:

Ответы

Автор ответа: apo1ynaria666
40

Ответ:

Диаметр - хорда, проходящая через центр окружности.

У нас диаметром является АВ, по условию сказано, что диаметр 16 см, а АС, СD и DB равны радиусу окружности.

d = 2r

d = 16см

Диаметр равен двум радиусам, а значит 1r равен половине диаметра, значит можем его найти:

1) 16 : 2 = 8 (см) - r

АС, СD и DB равны радиусу окружности.

3) 16 + (8*3) = 16 + 24 = 40 (см) - Р

Ответ: 40 см.

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