Предмет: Геометрия, автор: yurovaalenka

Радиус окружности с центром в точке О равен 13 см, длина хорды АВ равна 24см. найти расстояние от хордыАВ до параллельной ей касательной

Ответы

Автор ответа: tereshnik

нужно провести это хорду и касательную. потом через точку О проводите отрезок- перпендикуляр к этим АВ и касательной. длина этого отрезка и будет искомым расстоянием.
итак, решение:
это расстряние = расстояние от точки О до касательной + расстояние от точки О до АВ.
расстояние от точки до касательной=радиус=13см.
ОВ=ОА=13 см. расстояние от О до АВ находится т.Пифагора: (169-144)=(25)=5 см.
ответ: 5+13=18

Автор ответа: agata90

согласна, но считаю, что касательная может быть и с той же стороны от точки о, что и касательная. тогда мы будем не прибавлять к радиусу, а вычитать из него. 13-5=8.
итог 2 ответа: 8 и 18

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