# Introduction to Technical Drawing

Introduction to Technical Drawing Introduction to key vocabulary for Middle School Students Copyright 2012 Teresa Johnson All rights reserved by author. Permission to copy for single classroom use. Electronic distribution limited to single classroom use only.

Not for public display. Drafting A method of drawing used by technical fields to convey information about a product

or design. Lettering Used to give dimensions and other important information needed to fully describe an

item. http://www.technologystudent.com/despro_flsh/drawing2.html Guidelines Lightly drawn lines used for lettering.

http://www.technologystudent.com/despro_flsh/drawing1.html http://www.technologystudent.com/despro_flsh/drawing2.html Object Lines Thick dark line that outlines an

object Hidden Lines Thin but dark dashed line that shows the edge of a hidden surface

Accuracy The ability to avoid errors. Estimate A rough calculation

art by Phillip Martin Standard measurement A system of measuring that uses inches, feet, yards, and miles to describe distance, where an inch is divided into

16ths. (Also known as: English, US Customary or conventional measuring.) INCH RULER Metric measurement A system of

measuring based on the decimal system, where centimeters, meters, and kilometers, are used to describe distance. Linear Measurement A

measurement of the length of a line.

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