Question

Find the area of the quadrilateral formed by the points $(6,9),(7,4),(4,2)$ and $(3,7)$

Answer 1

Area of quadrilateral
$=\frac{1}{2}[42+6+16+63-(27+28+14+25\left)\right]$
$=\frac{1}{2}(127-93)=\frac{1}{2}\left(34\right)=17$ square unit