Draws arcs by a variety of methods.
Accessing the Command
command bar: arc
alias: a
menu bar: Draw  Arc
toolbar: Draw 
ribbon: Draw  Draw  Arc
: arc
Prompts you in the command bar:
Enter start of arc or [Center]: (Pick a point, enter coordinates, or enter an option)
Enter second point or [Angle/Center/Direction/End/Radius]: (Pick a point, enter coordinates, or enter an option)
End point: (Pick a point or enter coordinates)
Subsequent uses of this command change the initial prompt to:
Enter start of arc or [Center/Follow] <Follow>: (Pick a point, enter coordinates, or enter an option)
This command draws arcs by many methods. The full list is in the Draw  Arc menu shown below:
On each Arc icon a large green dot () indicates the first point that you pick. A small green dot () indicates the second point, and a small white dot () indicates the final point.
Command Options
Option 
Description 
ENTER to use last point 
Continues the arc tangent from the last point picked. 
Center 
Specifies the center point of the arc. 
Follow 
Continues the arc tangent from the last point picked (same as pressing Enter). 
Start of arc 
Specifies a different start point for the new arc. 
Angle 
Specifies the included angle, the angle between the arc's start point and

Center 
Specifies the center point of the arc; after this, you can specify one of the following to complete the arc:

Direction 
Specifies the direction of the tangent to the arc's start point; following this, you specify the following:

End point 
Specifies the arc's end point; following this, you can specify the following:

Radius 
Specifies the arc's radius; following this, you can specify the following:

Second point 
Specifies a point along the arc's circumference; following this, you specify the following:

Procedures
Grips Editing
Arcs can be edited directly through grips:

Select the arc. Notice that it has four grips.

Drag the grips to perform the following actions:

 Drag the endpoint and midpoint grips to stretch the arc.
 Drag the center grip to move the arc.
Related Commands
Circle  draws arcs and circles.
Ellipse  draws elliptical arcs.
Join  joins arcs.
PEdit  converts arcs to polylines.
PLine  draws connected polyline arcs.
DimRadius and DimDiameter  dimensions arcs.
Change  changes the endpoints of arcs.
Entity snaps that work with arcs:
Center  snaps to the center of arcs.
Endpoint  snaps to the endpoints of arcs.
Quadrant  snaps to the 90degree points on the circumference of arcs.
Tangent  snaps to the tangency of arcs.