Предмет: Геометрия, автор: malika1407

749 Точки S и Т являются серединами боковых сторон MN и LK равнобедренной трапеции МNLK. Равны ли векторы: а) NL и KL; б) MS и SN; в) MN и КL: г) TS и КМ; д) TL и КТ?​

Ответы

Автор ответа: Listvichka177
4

Определение: векторы равны, если они сонаправлены(и соответственно коллинеарны) и их длины равны

а) нет, хотя бы потому что они не сонаправлены

б)да, векторы коллинеарны(лежатна одной прямой) и отрезки MS и SN равны

в)нет, векторы не коллинеарны

г)нет, тк длины отрезков не равны

д)да, векторы коллинеарны(лежатна одной прямой) и отрезки TL и KT равны

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