XYZ axis and dimensional test

This is a 100mm x 100mm L shape that's meant to check your X/Y/Z axis are square.
Also works as a dimensional test, 100mm will give you a better idea than a 25mm cube. And you may print it faster. If you don't need to check the Z axis you can stop the print, to save time and filament.

Print it with the X (the long text) side facing the front so you'll know that is aligned with the machine X axis. Make sure is properly cooled down before removing, to avoid any distortion!
Then check for consistency in the 100mm sides (+- 1/10mm), your distance between the X-Y outer edge has to be 141.43mm for a perfect 90° angle (90.007 if you're that passionate). The Z side has to be 100.0mm, easy to check with a set of vernier calipers.
If you experience dimensional errors, you can still check it's square by measuring the 3 sides (X, Y, and X to Y) and use good ol' maths because it's a triangle ;-)

"why not using a protractor?" some may say.
Well you cannot measure 1/10 of degree that easy,