Предмет: Геометрия, автор: jjinjju9

ABCD- квадрат, точка Р - его центр. Прямая НР перпендикулярна к плоскости квадрата.

a) Докажите, что НА = НB=HC = HD.

в) Найдите НА, если АВ = 8, РН = 2.

Ответы

Автор ответа: haipmans

Объяснение:

а) В услокии сказано что прямая HP перпендикклярна плоскости квадрата, значит точка Н лежит за плоскостью квадрата ровно над точкой Р, так как Р это центр квадрата, то все прямые (РА, РВ и тд) являются проекцией прямых НА, НВ и тд. Отсюда НА = НB=HC = HD.

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