Question

if A(-5,7),B(-4,-5),C(-1,-6)and D(4,5) are the vertices of a quadrilateral,find the area of the quadrilateral ABCD

Answer 1

=1/2{(25+24-5+28)-(-28+5-24+25)}
=1/2{(72)-(-22)} 
=1/2{72+22}
=1/2{94}
=47sq.units