Question

Show that c ABCD formed by the vertices A(-4,-7), B(-1,2), C(8,5)
and D(5,-4) is a rhombus.

Answer 1

Al sides of vertices are equal

AB=3_/10

BC=3_/10

CD=3_/10

DA=3_/10

AB=BC=CD=DA

THEREFORE ,thes are the vertices of a rhombus