Menu: Draw / Arc / Start, End, Radius 
Creates an arc by defining its start point, end point, and arc radius.
Note: You can use the local menu options to create this arc differently. See the local menu options for "Arc: 3 Points" on page 179.
- Select the arc start point and then the end point. You can also specify the Length and Angle in the Inspector Bar.
- Move the cursor to set the radius arc, or enter the Radius in the Inspector Bar.
