Предмет: Геометрия, автор: kira30112004

отрезок BK является медианой треугольника DBE , BK=2,5 см. Длина BK равна половине длины DE , BD=3см , BE на 1 см больше DB. Найдите периметр треугольника DBE

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Автор ответа: vichkaantonenko

0

Р треугольника ДВЕ=ДВ+ВЕ+ДЕ. По условиюВК=О,5ДЕ, тогда ДЕ=2ВК=2,5*2=5см. т.к ВЕ на 1 см больше ДВ, то ВЕ=3+1=4см
Р=3+4+2,5=9,5 см

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