TWO-DIMENSIONAL DIMENSIONS
Dimensions are constraints that link geometric objects with a numeric parameter (dimension value). Each dimension measures a specific numeric geometric property, for example, the distance between points, the angle between lines, or the circle radius. Logical constraints and dimensions differ as the former have no numeric arguments. Each dimension always has one numeric argument (scalar) besides geometric arguments. Driving sketch geometry by using parameters and dimensions is discussed in Item Driving and Variational Dimensions.