Question

find the area of the quadrilateral whose vertices are taken in order A((-5,-3) B(-4,-6) C(2,-1),D(1,2).

Answer 1

I hope this answer is correct and also helps you in solving

Answer 2

join one diagonal of quadrilateral & take it as two triangles .. and find the area of both the triangles & add them. us e formula of triangle with three x,y coordinate
Area = [½*{x1(y2-y3) + x2(y3-y1) + x3(y1-y2)}]