Question 1019802
b, the third side or base side;
x, either congruent side of the isosceles triangle;
{{{x=2.5b}}}


{{{2x+b=10.8}}}


{{{2(2.5)b+b=10.8}}}


{{{6b=10.8}}}


{{{b=10.8/6}}}
{{{b=5.4/3}}}
{{{highlight(b=1.8)}}}