Предмет: Математика, автор: maratmarstik787magom

помогитеееее ..........

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Автор ответа: Darmsaft

1

Пойдём с конца: отрезок EF (обозначим за x) в три раза меньше, чем отрезок CD, то есть, x*3=3x. Отношение AB к CD равно 7, то есть, AB=CD*7=3x*7=21x. Следовательно, AB/EF=21x/x=21.

Ответ: 21.

maratmarstik787magom: а можешь посмотреть еще 1 вопрос в моем профиле?

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