Răspuns :
P=120
laturile: a, b,c
b=a+1
c=b+1=a+1+1
P=a+b+c
120=a+a+1+a+1`+1
120=ax3+3/-3
117=ax3 /:3
39=a
b=a+1=39+1=40
c=b+1=40+1=41
laturile: a=39
b=40
c=31
laturile: a, b,c
b=a+1
c=b+1=a+1+1
P=a+b+c
120=a+a+1+a+1`+1
120=ax3+3/-3
117=ax3 /:3
39=a
b=a+1=39+1=40
c=b+1=40+1=41
laturile: a=39
b=40
c=31