Question 202653
Let h be the height
Then the base,b, is given by {{{h+4}}}
{{{AreaOfTriangle = bh/2}}}
{{{30 = ((h+4)*h)/2}}}
{{{60 = h^2 + 4h}}}
{{{0 = h^2 + 4h -60}}}
{{{0 = (h+10)(h-6)}}}
So h is either -10 or 6. Since h must be positive, then height=6
base = height+4 = 10
Dimensions are h=6, b=10
Check your answer, does {{{30 = (6*10)/2}}}