Предмет: Математика, автор: karina00780

Heeeelp! 4 и 5 задания

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Автор ответа: katyasineva99

mn- средняя линия треуг. abc,
mn||ac, mn=1/2ac
np-сред линия треуг. bcd
np||cd, np=1/2cd
по теореме п. 10 ,плоскости mnp и acd ||

угол nmp=углу cad как углы с соответственно параллельными сторонами
т.к. треуг. mnp средн линия треуг abcd, находим p=48/2= 24 см

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