title: Calculate fillet between arc and a line
body: <p>I am trying to find some algorithms or formulas for doing a fillet or blend operation on the intersection of an arc and a line segment given a particular radius. In other words, I need to find the equation for the circle that will have tangent points on both the line and the arc.</p>
  
  <p>Eventually, this has to be calculated using VB.Net so any sample code will be appreciated.</p>