Axis: The plane, or line, one which a coordinate position is indicated.
Center Line: A line that is used to indicate the center of a circle, arc, or cylinder. It is made by alternating long and short dashes.
Coordinates: Points on a line used to indicate position and tell a computer or other machine where to move. The two most common coordinates,
X and y, indicate horizontal and vertical positions.
Freehand drawing: A drawing made with-out the use of mechanical aids such as rulers or drafting equipment.
Front View: The view, or drawing of an object obtained when the line of sight is directly in front of the object.
Hidden Lines: A series of short dashes on a drawing that indicates an edge which is hidden from view.
Isometric Drawing: A type of pictorial drawing in which the object is titles so its edges become axes that form equal 30-degree angles from
the horizontal. This is done so that the edges can be dimensioned. However the object itself often appears distorted.
Orthographic Projection: A method of making drawings in which more than one view of the object is shown. The views are drawn perpendicular to one
another. Drawings made using orthographic projection are called working drawings or view drawings.
Pictorial drawings: Technical drawings that create the illusion of three dimensions. The objects look more realistic.
Right Side View: The view, or drawing of an object obtained when the line of sight is at the side on the right.
Three-view Drawing: Technical drawing that is made using orthographic projection and that shows the three principal views of an object. Usually,
the top, front, and right side views are included. The views are drawn perpendicular to one another. Drawings made using orthographic
projection are called working drawings or view drawings.
Top View: The view, or drawing, of an object obtained when the line of sight is above the object, looking down.