Angle Shower How Do You Measure For A Neo-angle Shower Rod?

How do you measure for a neo-angle shower rod? - angle shower

When I look at the neo-angle shower rods online, the current measures, such as "36 x 48 x 36". But I think it can mean two different things ... 36 "could be the length of each short side, while 48" is the length of the middle segment. Or ... This could indicate that a bar is essentially a square of 36, indicating that 48 is "essentially the hypotenuse of the triangle.

Who knows which interpretation is correct? I need a neo-angle and do not want to ask the wrong things. Thanks in advance!