This tool is used to create a CAD Arc, using the 2 tangents and radius.
The video below will show how to create a CAD Arc using the 2 tangents and radius method.
Or continue down the page to see the CAD Arc 2 tangents and radius create option.
This CAD Arc 2 Tangents and Radius option is found on the CAD Arc Toolbar, and is the 4th option when the toolbar files out.
Or from the menu, Use: CAD => Arc => 2 Tangents and Radius
![snap048](https://12dwiki.com.au/wp-content/uploads/2018/10/snap048.jpg)
CAD Control Bar Options
The Arc is created and placed using the details from the CAD Control Bar, these include,
String Name, Model, Colour, Z – Value, Linestyle, Weight and Tinable.
If you would like to learn more about the CAD Control Bar and how to utilise it,
Visit this post: CAD Control Bar – How to Utilise It
Pick and Accept on the first tangent of a string segment.
Note: Arc and Circles in 12d Model can be both clockwise and anti-clockwise in direction.
Clockwise arc/circles are entered into a panel with a positive (+) radius.
Anti-Clockwise arc/circles are entered into a panel with a negative (-) radius.
Please check the direction of the arc/circle to be created and use pick with direction if required.
If you would like to learn more about Picking with Direction and how to utilise it,
Visit this post: Picking with Direction
![snap139](https://12dwiki.com.au/wp-content/uploads/2018/11/snap139.jpg)
Pick and Accept the second tangent of a string segment.
![snap148](https://12dwiki.com.au/wp-content/uploads/2018/11/snap148.jpg)
Type in the Radius for the arc, then hit the <Enter> key.
Remember the direction that the arc will be created, clockwise arc = positive radius, and an anti-clockwise arc = negative radius.
![snap149](https://12dwiki.com.au/wp-content/uploads/2018/11/snap149.jpg)
The new arc is created tangential to the 2 selected string segments and to the given radius.
![snap150](https://12dwiki.com.au/wp-content/uploads/2018/11/snap150.jpg)
Use a String Inquire to check the details of the new arc.
![snap151](https://12dwiki.com.au/wp-content/uploads/2018/11/snap151.jpg)