Question

f 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

area ABCD=
$| - 5( - 5 + 6) + - 4( - 6 - 7) + - 1(7 + 5)| + | - 4( - 6 - 5) + - 1(5 + 4) + 4( - 5 + 6)|$