Question 300452
an isosceles triangle has two equal sides
if one side is X then the other is X, the third is given at (1/2)X.
so the Perimeter is just all the sides added together
{{{X+X+(1/2)X=P}}}
{{{2X+(1/2)X=P}}}
{{{(4/2)X+(1/2)X=P}}}
{{{(5/2)X=P}}}