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calculatii perimetrul unui triungi abc daca ab=6cm ab =3cmbcsi ac=bc+3cm

Răspuns :

ab=3xbc
6=3xbc
bc=2
ac=2+3=5
P=6+2+5=13cm
P triunghi = AB + AC + BC = 6 + 3 + ( 3 + 3 ) = 9 + 6 = 15 cm