Tutorial 3.1

Cartesian Coordinate System: 

AutoCAD provides the user with an infinite two dimensional area to work with.

Any entities place on the working two dimensional plane can be defined relative

to the Cartesian coordinate system.
                The Cartesian coordinate system divides a two dimensional plane with

two perpendicular axis. The X axis runs horizontal across the bottom of the screen.

The Y axis runs vertically along the left side of the screen. These two axis intersect

at the bottom left corner of the screen.
Each of these axis is further divided into segments. Each segment is given a value.

The X axis segments increase in value to the right. The positive X values are to the

right of the intersection of the two axis. The negative X values are to the left. The

positive Y values are above the intersection and increase up. The negative Y values

are below.

 

1.Absolute Coordinates:

1. Type x,y coordinate when AutoCAD asks for a point. 

    
From point: 1,1                                                           
To point: 2,1                                                                       
To point: 2,2
To point: 1,2
To point: 1,1
NOTE: If dynamic input (F12) is on, you must type the # sign before entering absolute coordinates (e.g.#1,1).

2.Relative Coordinates:

1. Type @deltax,deltay when AutoCAD asks for a point.

From point pick point
To point: @1,0
To point: @0,1
To point: @-1,0
To point: @0,-1

3.Polar Coordinates:

1. Type @distance<angle when AutoCAD asks for a point.

From point: pick point
To point:@1<0
To point:@1<90
To point:@1<180
To point:@1<270