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fie tr MNP dreptunghic si MN=NP.
a) daca MP=18 cm,MN=?


Răspuns :

Aplicam th pitagora MN patrat+NP patrat=MP patrat, dar catetele aunt egale => 2MN patrat=324 => MNpatrat=162 => MN =radical don162=9 radical din2