Предмет: Геометрия, автор: Aria0Fox

СОР ПОМОГИТЕ ПОЖАЛУЙСТА
Если сможет с Чертежом и дано
Из центра окружности О к Хорде АВ равный 10 см перпенликуляр ОС найдите длину перпендикуляр а если угол ОАВ равен 45°

Ответы

Автор ответа: ViktoriaPobloki

Радиус, перпендикулярный хорде, делит эту хорду пополам. => АС=10:2=5см.

Треугольник АОС прямоугольный, т.к. ОС - перпендикуляр. Если в прямоугольном треугольнике один острый угол = 45°, то и второй = 45°.

Следовательно, треугольник АОС р/б, основание АО. АС=ОС=5см.

Ответ: 5см.

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