AUTOCAD TUTORIAL: Chapter 2 Introduction Of 2D Drawing Tool > Circle Tool

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AutoCAD has a wide library of commands. There are many commands which used to drawing any type of drawing. Today i am going to tell you about various method to drawing circle in AutoCAD.

Circle tool: 

Short key: C enter
To draw a
circle first select the circle tool by clicking the circle on draw toolbar or
by simply press C enter.
Now there
are six method to draw a circle which are explain given below.

1. Center-radius method:

This method is used when we know
the center and radius of the circle
procedure:
  • Select
    Circle tool from the quick access toolbar or press C enter.
  • Now specified
    center point of circle by
    x,y and press enter. If you don’t have specified location than click anywhere
    in drawing area.
  • Now enter
    the radius of circle and press enter.
Example:
To draw
a circle whose center lies at the origin and radius is 5.
Solution:
AUTOCAD TUTORIAL: Chapter 2 Introduction Of 2D Drawing Tool > Circle Tool

C
enter              (select the tool)
0,0 enter           (specified center point)
5 enter              (specified radius)

2. Center diameter method:

This method is used when we know the center and diameter of the circle
procedure:
  • Select
    Circle tool from the quick access toolbar or press C enter.
  • Now
    specified center point of circle by x,y and press enter. If you don’t have specified location
    than click anywhere in drawing area.
  • Now
    press D and enter.
  • Now
    enter the diameter of circle and press enter.
Example:
To draw
a circle whose center is (0,2)and diameter is 8.
Solution:
AUTOCAD TUTORIAL: Chapter 2 Introduction Of 2D Drawing Tool > Circle Tool

C
enter              (select the tool)
0,2 enter           (specified center point)
D enter              (select diameter input option)
8 enter              (specified diameter)

3. Two point method:

This method is used when
we know the two points from which the circle pass.
Procedure:
  • Select
    Circle tool from the quick access toolbar or press C enter.
  • Now
    press 2P and enter.
  • Now
    specified these two point by simply clicking the left click of mouse on drawing
    area. You can also use absolute coordinate by selecting first point by x,y and
    same as second point.
Example:
To draw
a circle which pass from two point (4,0) and (8,0).
Solution:
AUTOCAD TUTORIAL: Chapter 2 Introduction Of 2D Drawing Tool > Circle Tool

C
enter               (select the tool)
2P
enter             (select two point option)
4,0
enter            (specified first point)
8,0
enter            (specified second point)

4. Three point method:

This method is used when we know the two points from which the circle pass.
Procedure:
  • Select
    Circle tool from the quick access toolbar or press C enter.
  • Now
    press 3P and enter.
  • Now
    specified these three point from which circle pass by simply clicking the left
    click of mouse on drawing area. You can also use absolute coordinate by
    selecting first point by x,y and same as second and third point point.
Example:
To draw
a circle which pass from three point (4,2) , (8,4) and (2,2).

Solution:
AUTOCAD TUTORIAL: Chapter 2 Introduction Of 2D Drawing Tool > Circle Tool

C
enter               (select the tool)
3P
enter             (select three point option)
4,2enter             (specified first point)
8,4
enter            (specified second point)
2,2
enter            (specified third point)

5. Tangent tangent radius method:

This method is used when we know two tangent of the circle and radius of the circle.
Procedure:
  • Select
    Circle tool from the quick access toolbar or press C enter.
  • Now
    press TTR or T and enter.
  • Now
    specified first and second tangent by clicking on the tangent with the mouse.
  • Now
    enter the radius of circle and press enter.
Example:
To draw
a circle which has two tangents line AB and curve PQR and whose radius is 8.
Solution:
AUTOCAD TUTORIAL: Chapter 2 Introduction Of 2D Drawing Tool > Circle Tool

C
enter                        (select the tool)
TTR OR
T enter             (select Tangent-tangent-radius option)
Select
the line AB.
Select
the curve PQR.
8
enter                        (enter the radius)

6. Tangent-Tangent-Tangent method:

This method is used when we know three tangent of the circle.
Procedure:
  • Select
    the tangent-tangent-tangent option on drop down menu of the circle on the
    quick access toolbar.
  • Now
    specified first ,second and third tangent by clicking on the tangent with the
    mouse.

Example:
To draw
a circle which has three tangent line AB, line CD and curve PQR.
Solution:
AUTOCAD TUTORIAL: Chapter 2 Introduction Of 2D Drawing Tool > Circle Tool

Setect
the circle TTT tool from the quick access toolbar > draw toolbar>
circle> drop down menu> TTT.
Seclet
line AB.
Select
line CD.
Select
curve PQR.

Exercise:


Problem 1 : draw a circle whose radius is 8 and center lies at point (4,4).

Problem 2 : draw the following diagram-

AUTOCAD TUTORIAL: Chapter 2 Introduction Of 2D Drawing Tool > Circle Tool

Problem 3 : draw a circle which have radius three following tangent 
1. line AB which passes from point (3,4) and (6,8).
2. line CD which passes from origin and make angle 45 degree with x axis.
3. line EF which passes from point (0,4) and (0,8).

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