Предмет: Геометрия, автор: nikitoskit

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Автор ответа: 666ИнкОгнИтО666

0

так как MN параллельно DC угол MDC = углу AMN и угол NCD = углу ANM
следовательно эти треугольники подобны
$frac{7}{4} = frac{x}{5}$ = 8.75

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