# Design & Drafting Technology Unit 4

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Design & Drafting Technology Unit 4
Terms & Definitions Design & Drafting Technology Unit 4

Arc Any portion of the circumference of a circle

Diameter The distance across a circle passing through its center point

Radius The distance from the center point of a circle to the outside circumference

Ellipse A foreshortened circle having a major axis and a minor axis

Focus (Foci) Point(s) at which lines come toward each other or move away from each other

Freehand Technical Sketching
Making a drawing without the use of instruments, yet with care taken to obtain the correct line widths

Major Axis The axis passing through the foci of an ellipse

Minor Axis The chord of an ellipse passing though the center perpendicular to the major axis

Isometric Sketch A sketch based on the object being drawn on three axes spaced 120 apart

Oblique Sketch A sketch that shows the face of the object parallel with the plane of projection

Cabinet Sketch A sketch that shows only the face or the front of an object

Proportioning Drawing parts of an object in the same size relationship as the object itself

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