Angular dimensions measure the angle between two lines or three points. For example, you can use an angular dimension to measure the angle between two radii of a circle. The dimension line forms an arc.
To dimension a circle, you select the object and specify the angle endpoints. With other objects, you select the object(s) and then specify the dimension location. You can also dimension an angle by specifying the angle vertex and endpoints. As you create the dimension, you can modify the text content and angle before specifying the dimension line location.
If you use two straight, nonparallel lines to specify an angle, the dimension line arc spans the angle between the two lines. If the dimension line arc does not meet one or both of the lines being dimensioned, AutoCAD LT draws one or two extension lines to intersect the dimension line arc. The arc is always less than 180 degrees.
If you use an arc or a circle or select three points to specify an angle, AutoCAD LT draws the dimension line arc between the extension lines. The extension lines are drawn from the angle endpoints to the intersection of the dimension line arc.
AutoCAD LT uses the location you specify for the dimension line arc to choose between the minor and major angles specified by the angle vertex and the extension lines.