title: Draw arc by angle in SVG
body: <p>When I want to draw a pie chart in SVG, all tutorials say that you need to calculate the end point of the arc element. Unless you want an exact 90° angle, that calculated point must unvariably fall <em>beside</em> the circumference line of the underlying circle because of rounding, if you scale up the scalable (!) graphic.</p>
  
  <p>I cannot believe there is no way to draw a circle segment by giving a center, a radius and an angle.</p>
  
  <p>Or is there?</p>