Answer:
[tex](2.7,-1.5)[/tex]
Step-by-step explanation:
The points are [tex]A(-2.6,1.5), B(-2.6,3.3), C(2.7,3.3)[/tex]
The fourth vertex will can be found by the points [tex]A[/tex] and [tex]C[/tex].
The angles between the sides of a rectangle are [tex]90^{\circ}[/tex].
The [tex]x[/tex] coordinate will be the same as [tex]C[/tex] and the [tex]y[/tex] coordinate will be the same as [tex]A[/tex]. The fourth verex is [tex]D[/tex].
So, the fourth vertex of the rectangular piece will be [tex](2.7,-1.5)[/tex].