Find the area of the quadrilateral whose vertices are at
 
\((-8,-2)\), \((-8,-4)\), \((2,3)\) and \((1,-3)\)
 
Answer:
 
The vertices taken in order are:
 
x1,y1=-8,2,x2,y2=i,i,x3,y3=i,i,x4,y4=i,i
 
Area of the quadrilateral \(=\)  \(sq. \ units\).