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

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: 

1. Center-radius method:

• 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:

C
enter              (select the tool)

0,0 enter           (specified center point)

5 enter              (specified radius)

2. Center diameter method:

• 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:

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:

• 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:

C
enter               (select the tool)

2P
enter             (select two point option)

4,0
enter            (specified first point)

8,0
enter            (specified second point)

• 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:

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:

• 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:

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:

• 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.

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-

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).