Question 953513
h=height=30m; a=base=20m; s=slant height; A=area
{{{s^2=((1/2)a)^2+h^2}}}
{{{s=sqrt((1/4)a^2+h^2)}}}
{{{s=sqrt((1/4)20^2+30^2)}}}
{{{s=sqrt(100m^2+900m^2)}}}
{{{s=31.6m}}}
{{{A=(1/2)sa}}}
{{{A=(1/2)(31.6m)(20m)}}}
{{{A=316m^2}}} ANSWER: The area is 316 square meters.