A heavy solid line drawn parallel to the edges of the drawing paper.

A measurement of length, width, or thickness.

A drawing showing all dimensions at once in one view of the object, also called an Isometric drawing.

A drawing showing each view of an object, usually the front, top and ends of an object, also called an Orthographic drawing.

A picture or likeness of an object drawn to exact scale.

A rough drawing of an idea, object or procedure.

A solid line showing the visible edges and form of an object.

A series of dashes which indicates the presence of unseen edges.

A solid line with arrowheads at the ends to indicate length, width, or height of an object or part.

A solid line that extends away from the object without touching the object, that shows the exact area specified by a dimension,

A solid zig-zag line used to show that the illustration stops but the object does not.

A long-short-long line used to indicate the center of a round object.

A solid line with an arrow used with an explanatory note to point to a specific feature of an object.

The ratio between the size of something and a representation of it.