Cobb's angle is used to measure the degree:
The angle between intersecting lines drawn perpendicular to the top of the top veebrae and the bottom of the bottom veebrae is the Cobb angle Cobb's angle of 10 degree is minimum angulation to define the scoliosis.
Kyphoscoliosis
Angular deformity of the knee
Extent of depression in calcaneal fracture
Extent of spondylolisthesis
Fracture Management