Arc by 2 Points and a Specified Radius To create an arc by 2 points and a specified radius: 1. Click the Arc tool from the Basic palette. 2. Click the Arc by 2 Points and a Specified Radius mode button. 3. Click to set the start point of the arc. 4. Click to set the end point of the arc. The Arc Radius dialog box opens. 5. Enter the length of the radius. 6. Click OK. The arc is created.