Question

The area of the quadrilateral with vertices at (2,-1),(4,3),(-1,2)and (-3,-2) is

Answer 1

Area of the quadrilateral=
[2. 4. -1. -3]
[-1. 3. 2. -2]
={(2*3+4*2+-1*-2)-(-1*4+3*-1+2*-3)}
Area of quadrilateral=29sq units