Răspuns :
notam acel triunghi isoscel ABC, laturile congruente fiind AB si AC
AC=AB=BC-2
perimetrul =AB+AC+BC=BC+2AC=56=>
=>BC+2(BC-2)=56=>BC+2BC-4=56=>3BC-4=56=>3BC=60=>BC=20cm
AC=AB=20-2=18cm
AC=AB=BC-2
perimetrul =AB+AC+BC=BC+2AC=56=>
=>BC+2(BC-2)=56=>BC+2BC-4=56=>3BC-4=56=>3BC=60=>BC=20cm
AC=AB=20-2=18cm
x+y+z
x,y=laturile congruente
x+y=z+2
(56+2):2=29(x+y)
z=29-2=27
x=29/2
x=14,5
y=14,5
x,y=laturile congruente
x+y=z+2
(56+2):2=29(x+y)
z=29-2=27
x=29/2
x=14,5
y=14,5