1-2 AutoCAD
®
LT 2000 MultiMedia Tutorial
Introduction
Learning to use a CAD system is similar to learning a new language. We need to begin
with the basic alphabets and learn how to use them correctly and effectively through
practice. This will require learning some new concepts and skills as well as learning a
different vocabulary. All CAD systems create designs using basic geometric entities.
Many of the constructions used in technical designs are based upon two-dimensional
planar geometry. The method and number of operations that are required to accomplish
the construction are different from one system to another.
In order to become effective in using a CAD system, we must learn to create geometric
entities quickly and accurately. In learning to use a CAD system, Lines and Circles are
the first two, and perhaps the most important two, geometric entities that we need to
master the skills in creating and modifying. Straight lines and circles are used in almost
all of the technical designs. In examining the different types of planar geometric entities,
we can see that triangles and polygons are planar figures bounded by straight lines.
Ellipses and Splines can be constructed by connecting arcs with different radii. As we
gain some experience in creating lines and circles, the similar procedures can be applied
to create other geometric entities. In this lesson, we will examine the different ways of
creating lines and circles in AutoCAD
®
LT 2000.
Starting Up AutoCAD
®
LT 2000
1. Select the AutoCAD
®
LT 2000 option on the program menu or select the
AutoCAD® LT 2000 icon on the desktop. Once the program is loaded into
memory, the AutoCAD® LT 2000 Drawing Screen and the Startup dialog
box will appear on the screen.
2. In the Startup dialog
box, select the Start
from Scratch icon
with a single click of
the left-mouse-
button.
3. In the Default
Settings section, Pick
English (Feet and
Inches) as the
drawing units.
4. Pick
OK in the
Startup dialog box to
accept the selected
settings.
English
Start from scratch
OK