Bed align test

I have decided to perform this pattern to detect errors in the alignment of the hot bed, since the frame of the printer seems to be out of square and could not print a T with 2 exact 90º angles, also had problems when making a circumference, since this it came out as an ellipse.
You can see the problem in the photo.

I used these model to solve the align problem
https://www.thingiverse.com/thing:2701566
https://www.thingiverse.com/thing:2152976
https://www.thingiverse.com/thing:2110859