Drawing an arc based on a center point and radius

Tool(s): Circle

To draw an arc

1. Click Circle (How).
   

   Activate Circle in one of the following ways

   • Actionbar:Role Architecture Task Design Task area 2D Objects

   • Menu bar: Create Draft

   • Keyboard: CTRL+K

   • Palette: Tools Create area in the following module(s):

   Draft

   Site Plan

2. You can apply symbols to the start point and end point of the arc or draw the arc as a pattern line.
   

   You can apply start symbols and end symbols to various 2D elements. To do this, you can use the Properties palette - Element area.

   • Select the symbol you want to use and define its size in millimeters.
   • Decide whether you want to apply a start symbol or an end symbol or both symbols by selecting the relevant the check boxes.
   • While drawing, you can change the symbol or switch it off at any time.
3. Click Circle based on center point.
4. Define the end point of the arc in one of the following ways:
   • Enter end angle
   • Enter end angle based on delta angle
   • Enter end angle based on arc length

     You can change this setting later.

5. Enter the center point.
6. Define the radius of the circle in one of the following ways:
   • Click a point.
   • Click an element. Allplan then places the circle on a tangent to the element.
   • Enter the value for the radius in the dialog line and press Enter to confirm.

     Tip: To draw a full circle, press ESC now.

7. Define the circle's starting point in one of the following ways:
   • Click a point.
   • Enter the starting angle (counter-clockwise, relative to the horizontal x axis).
8. Define the end point of the circle in one of the following ways:
   • Click the end point.
   • Click Enter end angle in the Input options and enter the end angle (counter-clockwise, relative to the horizontal x axis).
   • Click Enter end angle based on delta angle in the Input options and enter the delta angle (relative to the starting angle).
   • Click Enter end angle based on arc length in the Input options and enter the length of the arc (relative to the starting angle).

     Tip: You can undo every entry made in reverse order by clicking Back in the Input options.

     The arc is drawn.

     Example