Question 125342
{{{20^2 = 16^2 + h^2}}}
{{{400 = 256 + h^2}}}
{{{h^2 = 400 - 256}}}
{{{h = sqrt(144)}}}
{{{h = 12}}}
perimeter = 12 + 16 + 20
perimeter = 48
---------------
{{{A = (1/2)*b*h}}}
{{{A = (1/2)*16*12}}}
{{{A = 96}}}