Please tell me the correct answer. If u answer correct I’ll mark u as brainiest. I really need help.

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)

The figure below shows rectangle abcd and the triangle eca on a coordinate plane. which of the following expressions represents the perimeter of triangle of triangle eca in units

What’s the answer ? use the picture to see the problem