Контрольные задания > DF + FM + DM = 28; P = 36; FM = ?

Вопрос:

DF + FM + DM = 28; P = 36; FM = ?

Ответ:

Периметр треугольника DF + FM + DM = P, поэтому если P = 36, то FM = 36 - 28 = 8.

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