How to Draw a Circle in Autocad

Object AutoCAD Circle

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AutoCAD drawing command

Circle

Definition

Circle in AutoCAD is simplest flat object, which is closed curve, all points of which are equidistant from center.

Tool

AutoCAD Circle tool command that allows you to build two-dimensional circle object (by default, by central point and radius).

Command

Circle

Object

Circle

The Circle tool in program is often used and is inferior in frequency of calls only to Segment tool.

Command Circle

Circle command is responsible for creating circles in AutoCAD, which can be called up in following ways (start building circle):

• you can create circle in AutoCAD from menu bar, item Drawing - Circle line;
• You can draw circle from Home tab of ribbon of tools - in group of tools Drawing Circle button;
• You can create it from Drawing toolbar - Circle button;
• You can also start building circle in AutoCAD from command line by typing command name on command line Circle.

In total there are 6 ways to build circle in AutoCAD, which are divided into 3 groups:

• Center, Radius, Diameter.
• 2 points, 3 points.
• 2 Points of tangency, Radius (3 points of tangency).

By default, access to all methods for constructing circle in AutoCAD can be obtained from menu bar, Drawing - Line Circle with drop-down list of building methods, as well as on Home tab of tool ribbon - in Tool group Drawing button in AutoCAD Circle with nested buttons for constructing circle.

Note

You can create nested circle toolbar in AutoCAD in Drawing toolbar containing all necessary construction methods.

Build circles in AutoCAD by default (by center point and radius)

Call tool Circle in AutoCAD. command prompt will prompt:

Center of circle or [3T/2T/KKP]:

In response to request, we specify center point of AutoCAD circle by clicking in desired place in drawing or by entering coordinates into command line. preview of circle is displayed, radius of which changes according to movement of cross-hair pointer. By default, yellow dashed line appears, which follows from center point of AutoCAD circle to cross-hair pointer. system will prompt you:

Radius of circle or [Диаметр]:

Specify radius of circle by selecting point in drawing or by typing radius of circle in command line. As soon as you specify it, circle in AutoCAD will be drawn, work of Circle command will end.

Construction circle in program in special ways

Quite often there is need to build circle in AutoCAD along central point and diameter, since most of sizes of circles in drawing are indicated by its diameter. Build circle in AutoCAD so that it passes through certain points or that it touches any objects.

How to build circle at center point and diameter

Call command Circle in AutoCAD. command prompt will prompt:

Center of circle or [3T/2T/KKP]:

In response to request, we specify center point of AutoCAD circle by clicking in desired place in drawing or by entering coordinates into command line. preview of circle, whose diameter changes in accordance with movement of cross-hair pointer, is displayed. By default, yellow dashed line appears, which follows from center point of circle in AutoCAD to cross-hair pointer. program will request:

Radius of circle or [Диаметр]:

Select option "Diameter". system will display query:

Diameter of circle:

Let us set diameter of AutoCAD circle by pointing point by clicking on drawing. As soon as you specify diameter, it will be built, and Circle command will complete execution.

How to make circle in AutoCAD two points

Call team Circle. command prompt will prompt:

Center of circle or [3T/2T/KKP]:

In response to request, select option "2T". Next, you will need to set 2 points of future diameter of circle. program will request:

The first end point of diameter of circle:

Point point by clicking on drawing. preview of AutoCAD circle is displayed, diameter of which will change as position of cross-hair cursor moves. yellow dashed line will appear, which follows from first end point of diameter of circle to cross-hair cursor. following prompt appears on command line:

Second end point of diameter of circle:

Point point by clicking on drawing. As soon as you specify circle diameter with two points, circle in AutoCAD will be constructed, and Circle command will complete its execution.

How to draw circle in AutoCAD on three points

Call in AutoCAD tool Circle. command prompt will prompt:

Center of circle or [3T/2T/KKP]:

In response to request, select option "3T". Further consistently it will be necessary to specify 3 points through which AutoCAD circle will pass. system will prompt you:

The first point of circle:

Point point by clicking on drawing. yellow dashed line will appear, which will follow from first point of circle in AutoCAD to cross hairs cursor. program will display following query:

The second point of circle:

We indicate in AutoCAD second point of circle by clicking on drawing. Its preview will be displayed, which will pass through 1 and 2 points and change with movement of crosshair cursor. dashed yellow line will exit from 2 points to cross hair cursor. program will request:

The third point of circle:

Point point by clicking on drawing. As soon as you specify 3 points, AutoCAD circle will be constructed, "Circle" command will complete execution.

Note

When constructing circle by 3 points - these points should not lie on one straight line, otherwise construction of circle will be impossible.

How to build circle on two points of tangency and radius

Call team Circle in AutoCAD. command prompt will prompt:

Center of circle or [3T/2T/KKP]:

Select option "KKR (building circle in AutoCAD by 2 points of tangency and radius)". program will display request:

Pick point on object that defines first tangent:

Let's bring cursor to segment. program recognizes segment, denoting object binding "Tangent". By default, "Tangential Delay" prompt appears. Click on segment. AutoCAD will issue request:

Pick point on object that defines second tangent:

In response to query, click on polyline. following query will appear:

Circle radius:

The radius of AutoCAD circle can be set by entering its value in command line or by specifying two points in drawing, distance between which will become radius value. As soon as you specify radius, circle in AutoCAD will be constructed, Circle command will complete execution.

Construction of circle in AutoCAD on three points of contact

Select option "3 points of contact" command "Circle" in AutoCAD from menu bar, click "Drawing" - line "Circle" - in drop-down list, select line 3 points of contact.

Now you need to specify 3 points of tangency of circle to objects, sequentially responding to command line requests:

The first point of circle: to
The second point of circle: to
The third point of circle: to

We select segments by mouse click. As soon as you specify 3 point of tangency, circle in AutoCAD will be constructed, and Circle command will complete its execution.

Useful lessons and related topics

I recommend to get acquainted with similar lessons on AutoCAD:

• how to cut circle;
• red circles (gap defect of closed hatching circuit);
• divide circle into equal parts in AutoCAD;
• how to fill circle (section Hatching | Gradient);
• isometric circle in AutoCAD;
• маскировка круга (на заметке);
• array in circle in AutoCAD (copy in circle);
• mate and circle in AutoCAD (practical lesson).

Read and see also:

• how to draw objects;
• text in AutoCAD.

Courses, tutorials AutoCAD:

1. 2D design.
2. 3D modeling.
3. descriptive geometry.
4. Engineering graphics.
5. House plan.
6. Assembly drawing of spur gear.
7. 3D kitchen model.

Video "How to draw in AutoCAD circle, arc"

This video tutorial and article are included in Avtokad's professional free video course, which is suitable for both novice users and those who have been working in program for long time.

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Source: https://drawing-portal.com/en/creation-of-objects-in-autocad/circle-in-autocad.html

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