Предмет: Математика, автор: zuk447390valeria

ПОМОГИТЕ!!!!!!!!!!!!!!!!!!!!!1

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Автор ответа: маслёнок95

0

тангенс угла это отношение противолежащего катета к прилежащему, следовательно,
tgа=DE/FE
отсюда
FE=DE/tga=10/0.2=50 см

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