if a(-5 7) b(-4 -5) c(-1 -6) and d(4 5) are the vertices of a quadrilateral find the area of abcd
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=1/2{(-25-24-5+28)-(-28-5+24-25)}
=1/2{(-26)-(-36)}
=1/2{-26+36}
=1/2{8}
=4 sq.units
=1/2{(-26)-(-36)}
=1/2{-26+36}
=1/2{8}
=4 sq.units
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