Breadcrumb Home 1A50.75 - Curved Surfaces Code Number: 1A50.75Demo Title: Curved SurfacesCondition: ExcellentPrinciple: 3-D Curves and TangentsArea of Study: MechanicsEquipment: Tangle® ToyProcedure: Tangle® has been used to help describe such things as general 3-D curvatures, localized tangent vectors, and local angular momentum vectors.