To create an arc, you can specify combination of center, endpoint, start point, radius, angle, chord length, and direction values. Arcs are drawn in a counterclockwise direction by default. Hold down the Ctrl keys as you drag to draw in a clockwise direction. 

The following options are available: 

If you press ENTER without specifying a point, the endpoint of the last drawn line or arc is used and you are immediately prompted to specify the endpoint of the new arc. This creates an arc tangent to the last drawn line, arc, or polyline. 

Second Point

Specify the second point (2) is a point on the circumference of the arc. 

End Point

Specify the final point (3) on the arc. 

You can specify a three-point arc either clockwise or counterclockwise. 

Start Point

Specify the start point of the arc. 

End Point

Using the center point (2), draws an arc counterclockwise from the start point (1) to an endpoint that falls on an imaginary ray drawn from the center point through the third point (3). 

The arc does not necessarily pass through this third point, as shown in the illustration. 

Angle

Draws an arc counterclockwise from the start point (1) using a center point (2) with a specified included angle. If the angle is negative, a clockwise arc is drawn. 

Chord Length

Draws either a minor or a major arc based on the distance of a straight line between the start point and endpoint. 

If the chord length is positive, the minor arc is drawn counterclockwise from the start point. If the chord length is negative, the major arc is drawn counterclockwise. 

Center Point

Draws an arc counterclockwise from the start point (1) to an endpoint that falls on an imaginary ray drawn from the center point (3) through the second point specified (2).

Angle

Draws an arc counterclockwise from the start point (1) to an endpoint (2), with a specified included angle. If the angle is negative, a clockwise arc is drawn. 

Included Angle

Enter an angle in degrees or specify an angle by moving the pointing device counterclockwise. 

Direction

Begins the arc tangent to a specified direction. It creates any arc, major or minor, clockwise or counterclockwise, beginning with the start point (1), and ending at an endpoint (2). The direction is determined from the start point. 

Radius

Draws the minor arc counterclockwise from the start point (1) to the endpoint (2). If the radius is negative, the major arc is drawn. 

Start Point

Specify start point of an arc. 

End Point

Draws an arc counterclockwise from the start point (1) to an endpoint that falls on an imaginary ray drawn from the center point (2) through a specified point (3). 

Angle

Draws an arc counterclockwise from the start point (1) using a center point (2) with a specified included angle. If the angle is negative, a clockwise arc is drawn. 

Chord Length

Draws either a minor or a major arc based on the distance of a straight line between the start point and endpoint. 

If the chord length is positive, the minor arc is drawn counterclockwise from the start point. If the chord length is negative, the major arc is drawn counterclockwise. 

End Point of Arc

Specify a point (1). 

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