AB = √[(xA -xB)² + (yA - yB)²] = √[(-3-5)² + (2 -2)²] =√(64+0)=√64=8
AC = √[(xA -xC)² + (yA - yC)²] = √[(-3-1)² + (2 -6)²] =√(16+16)= √32=4√2
BC = √[(xB -xC)² + (yB - yC)²] = √[(5-1)² + (2 -6)²] =√(16+16)= √32=4√2
AC=BC =4√2 rezulta ca triunghiul este isoscel