Profile - a completed sketch that is used to create a solid
Tangent - Touching but not intersecting
Constraints - the geometric relationships, dimensions, or equations, that control the size, shape, and
orientation and include assumptions that the CAD sketcher makes
Implicitly defined - hidden from the sketcher
Coincident - forces two points to coincide
Concentric - makes the centers of arcs or circles coincide
Collinear - forces a line to be collinear to another line
Linear constraints - define the distance between two points or lines
Radial constraints - specify the radius or diameter of an arc or circle
Angular constraints - measure the angle between two lines
Associative constraints - also called algebraic constraints, is used to relate one constraint to another via
an equational in variables
Variational Technique - solves the algebraic constraint variable all at once, once there are enough
equations
, Parametric Technique - solves the algebraic constraints in sequential order
Driving dimension - changing the dimensions changes the model
Driven dimension - changing the model changes the dimensions
Ground constraint - the first constraint applied, they serve as anchors to fix geometry in place, and are
usually a line or point having been made coincident with the origin or plane
Regeneration - Updating the profile to show its new shape after constraints are changed or added
Protrusion - when material is added
Cut - when material is removed
Revolved feature - both the profile and axis of revolution must be coplanar to both lie on sketch plane
Features - protrusions and cuts on the main body of the model
Base feature - the starting overall shape of a model, greatest function for features
Form feature - a recognizable area of part that has a specific function or method of manufacture
Round - smooth external edge, eliminates sharp edges for safety
Fillet - smooth internal edge, reduces stress at a corner and makes fabrication easier
Chamfer - angled cut rather than smooth transition/radius on round/fillet
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