Drawing arcs by CBE (Center-Beginning-End)

You can construct an arc by sequentially positioning three points (center, starting and end), as well as the radius of the arc and the angle between the two radii connecting the center with the beginning and the end points of the arc, respectively.

Control points

An arc defined by a center, a beginning and an end has four control points: the starting and end points, the center point of the circle the arc belongs to, and a point that lies in the middle of the circumferential length of the arc. While you are drawing an arc by CBE, the following pointers appear:

About to draw the center of the arc.

About to draw the starting point of the arc.

About to draw the end point of the arc.

NOTE: The contextual edit bars, attributes and tabular pane presentation, as well as the procedures for modifying and repositioning of an arc are the same for all arc-drawing modes except for arc by BEH.

To draw an arc by CBE

1. Do any of the following:

• On the Objects toolbar, click Arc by CBE .
• On the Objects menu, point to Arcs, and then click Arc by CBE.
• Press CTRL+D+A+C+B.

2. (Optional) Snap the center point of the circle the arc belongs to, to another object or point.
3. In the graphical area, click where you want to draw the center point of the circle the arc belongs to.
4. (Optional) Snap the beginning point of the arc, that you are about to place, to another object or point.
5. Drag the mouse in the desired direction and draw the starting point of the arc.
6. To finish the arc, do any of the following:

• Snap the would-be end point of the arc.
• Point to where you want the end point to be, and then click.
• In the contextual edit bar, enter Radius and Angle values directly, press ENTER, and then click anywhere in the graphical area.

NOTE: To switch the directions in which the arc is being constructed, before you draw the end point, press CTRL.