Show that the points A(3,0) ,B(8,2) ,C(-1,4),D(-2,-1)are the vertices of rhombus. Find its area.

Show that the points A(3,0) ,B(8,2) ,C(-1,4),D(-2,-1)are the vertices

1.	Show that the points A(3,0) ,B(8,2) ,C(-1,4),D(-2,-1)are the vertices of rhombus. Find its area.
Answer» Ok john