Предмет: Геометрия, автор: jj2407

геометрия 8 класс. 10 баллов​

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Ответы

Автор ответа: Аноним
1

Если треуг. АСВ прямоугольный, ТО УСЛОВИЕ косинус В здесь лишнее, поскольку СН²=АН*НВ.

СН находим из из треуг. АСН, Это 18*(5/6)=15, тогда 225 = 18*СН, откуда СН равен 225/18=12,5

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