Помогите решить 8 класс !!! В прямоугольнике KLMN O- точка пересечения диагоналей, LR и NS-

Помогите решить 8 класс !!!
В прямоугольнике KLMN O- точка пересечения диагоналей, LR и NS- высоты треугольника KLO и MON соответственно, угол LOR=60 градусов, KR= 5 см. Найдите OS.
В параллелограмме ABCD угол С равен 45 градусов. Диагональ BD перпендикулярна AB и равна 7 см. Найдите DC.
- Предмет:
  Геометрия
- Автор:
  ananíasrhtg
- 5 лет назад

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Где разбор? Почему именно так ?
- Автор:
  kingflowers
- 5 лет назад
- 0
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