Xray showing malunion of uppper end tibia fracture. For ease of understanding lines have been drawn.

Upper TIbia Fracture Malunited In Varus Position

The arrow indicates the fracture.

Grey line indicates the long axis of the tibia. White line is the line perpendicular to transverse axis of tibial articular surface. In normal anatomical position, the grey line should coincide with white line. The angle indicates a deviation from axis.