Question 1054435
For the triangle,
{{{b=2h}}}
{{{A=(1/2)bh=648}}}
{{{(1/2)(2h)h=648}}}
{{{h^2=648}}}
{{{h=18sqrt(2)}}}{{{in}}}
{{{h=36sqrt(2)}}}{{{in}}}
.
.
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For the rectangle,
{{{L=3+W}}}
{{{A=L*W=648}}}
{{{(3+W)W=648}}}
{{{W^2+3W-648=0}}}
{{{(W-24)(W+27)=0}}}
Only positive W values make sense here,
{{{W-24=0}}}
{{{W=24}}}{{{in}}}
So,
{{{L=3+24}}}
{{{L=27}}}{{{in}}}