How to choose the degree of glass shower door hinges?

90 degree glass door hinge suitable for connection installation between door and wall or door frame, If one side is a fixed wall, please choose 90 degree glass door hinge.
135 degree glass door hinge suitable for 135 degrees connection installation between the door and the fixed glass,If both sides are glass, or the door and glass are angled at 135 degrees, please choose 135 degrees.

180 degree glass door hinge is suitable for the installation of the same straight line connection between the glass and the fixed glass,If both sides are glass or the door and glass need to be in a straight line, please choose 180 degrees.