1.3.2 - Circle - basic

To draw a Circle, you can specify varius combinations of center, radius, diameter, points on the circumference and tans.
The default method is to specify the center and the radius.

There are and other ways to draw a circle depending on the available data.

You can access the Circle command through the follow :

1. Keyboard : Type in circle and press Enter
2. Cascading menus : Draw ►Circle ►Center, Radius
3. Toolbar icon :Draw toolbar (icon)
4. Ribbon :Home tab ►Ccircle (Fig. 1.3.2.1)

To draw Circles you will use now the Ribbon, to insert the Circle command.

On Ribbon ► Click Home tab ► Draw panel ► Click the Circle icon (hover on) ►.

You will see the drop-down menu with the various methods to draw a circle (Fig. 1.3.2.1), with combinations of center, radius, diameter, points tanss.

• Fig.1.3.2.1 - Create a Circle using the Ribbon

  

  Fig.1.3.2.1 - Create a Circle using the Ribbon
  Fig.1.3.2.1 - Create a Circle using the Ribbon

- Draw a Circle by specifying a center and radius.

From the drop-down menu of Circle on ribbon, select the Center-Radius icon (hover on ►)

1. Commandline prompt says: Specify center point of circle or [ 3P/2P/Ttr (tan tan radius)] : Using the mouse, click near the point P1 on screen, or for more accuracy type on the Command prompt: 12,12 to insert the coordinates of the point P1, and define the Center of the Circle.
2. Commandline prompt says: Specify radius of circle or [Radius] : Pick with your mouse a second point near to P2 or or for more accuracy on the Command prompt: type 1.20 to insert the length of the Radius of the Circle.

• Fig. 1.3.2.2 -  Draw a Circle by Center and Radius

  

  Fig. 1.3.2.2 -  Draw a Circle by Center and Radius
  Fig. 1.3.2.2 - Draw a Circle by Center and Radius

- Draw a Circle by specifying a center and diameter.

From the drop-down menu of Circle on ribbon, select the Center-Diameter icon (hover on ►)

1. Commandline prompt says:Specify center point of circle or [ 3P/2P/Ttr (tan tan radius)] : Using the mouse , click near the point P1 on the screen , or for more accuracy type on the Command prompt: 15,15 to insert the coordinates of the first point P1, and define the Center of the Circle.
2. Commandline prompt says:Specify radius of circle or [Diameter] : type d to select Diameter and press Enter,
3. Commandline prompt says:Specify diameter of circle < > : Pick with your mouse a point to specify the length of diameter or or for more accuracy on the Command prompt: type 2.40 to insert the length of the diameter of the circle.

• Fig. 1.3.2.3 -  Draw a Circle by Center and Diameter

  

  Fig. 1.3.2.3 -  Draw a Circle by Center and Diameter
  acad_drawCircle_centerDiameter_600_184-15.png

- Draw a Circle tangent to two objects.

You will create a circle with a specified radius = 4, tangent to the lines A1 and A2 as shown in Fig. 1.3.2.4.

From the drop-down menu of Circle select the Tan, Tan, Radius icon (hover on ►)

1. Commandline prompt says:Specify point on object for first tangent of circle : Using the mouse , select the line A1 to define the first tangent object .
2. Commandline prompt says:Specify point on object for second tangent of circle : Using the mouse , select the line A2 to define the second tangent object .
3. Commandline prompt says:Specify radius of circle < > : type 4 to insert the length of the radius of the circle.

• Fig. 1.3.2.4 - Draw a Circle using Center and 2 Tangets

  

  Fig. 1.3.2.4 - Draw a Circle using Center and 2 Tangets
  Fig. 1.3.2.4 - Draw a Circle using Center and 2 Tangets