Răspuns :
AB = radical [ (-1-2)^2 + (1-5) ^2 ] = radical 25 = 5
BC= radical [ (2-5)^2 + (5-1) ^2 ] = radical 25 = 5
AC= radical [ (-1-5)^2 + (1-1)^2 ] = radical 36 = 6
AB=BC rezulta ca triunghiul ABC este isoscel
BC= radical [ (2-5)^2 + (5-1) ^2 ] = radical 25 = 5
AC= radical [ (-1-5)^2 + (1-1)^2 ] = radical 36 = 6
AB=BC rezulta ca triunghiul ABC este isoscel
AB = radical [ (-1-2)^2 + (1-5) ^2 ] = radical 25 = 5
BC= radical [ (2-5)^2 + (5-1) ^2 ] = radical 25 = 5
AC= radical [ (-1-5)^2 + (1-1)^2 ] = radical 36 = 6
BC= radical [ (2-5)^2 + (5-1) ^2 ] = radical 25 = 5
AC= radical [ (-1-5)^2 + (1-1)^2 ] = radical 36 = 6