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1. AUTO CAD
2012
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2. INTRODUCTION
•Auto cad is a Cad software of Autodesk.
•It is invented in 1982 in US.
•Auto cad LT and Auto cad Mastering.
•Previously used in DOS, now a day used in
windows.
•Used in every field Mechanical, Civil, Arch,
Electrical, Interior Design, Automobile etc..
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3. Auto Cad Interface
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4. Types of Co-ordinates
1. Absolute Co-ordinate.
2.Relative Co-ordinates.
3.Polar Co-ordinates.
AND
DDE (Direct Distance Entry ) Method
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5. Absolute Co-ordinate
• Absolute coordinates are based on the UCS origin (0,0)
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6. Absolute Co-ordinate
• Absolute coordinates are based on the UCS origin (0,0)
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7. Absolute Co-ordinate
(X,Y)
(0,0)
(X,Y)
(30,20)
(X,Y)
(30,0)
(X,Y)
(0,20)
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4 3
30
20
Y
1 2 X

8. Relative Co-ordinates
• Relative coordinates are based on the
last point entered.
• When you know the location of a point
in relation to the previous point.
• Use @ sign. For example, entering
@3,4
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9. Relative Co-ordinate
Y X
X
(@-30,0) (@0,20)
(Click Any where) (@30,0)
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4 3
30
20
Y
X
Y
X
Y
(@0,-20)
1 2

10. Polar Co-ordinates
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• Polar coordinates use
a distance and an
angle to locate a point.
• Use @ dis < angle. For
example, @50<45

11. Polar Co-ordinate
90
180 0
90
180 0
(@30<180) (@20<90)
270
90
0
(@30<0)
270
(@20<270)
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4 3
1 2
30
20
90
0
Click any where
START YOUR 1ST CLASS-ALL THE BEST.

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