Hi, I need help :( pleaseeess

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

The vertices of a rectangle are given in the columns of the matrix . if is found to perform a transformation, what are the coordinates of the transformed rectangle? (0, 0), (0, –3), (–3, –3), (–3, 0) (0, 0), (0, 3), (3, 3), (3, 0) (0, 0), (0, 3), (–3, –3), (–3, 0) (0, 0), (0, 3), (–3, 3), (–3, 0)

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)