title: Find coordinates of one point in a triangle given the coordinates of the other 2
body: <p>I have the following information about a 2D triangle:  </p>
  
  <ul>
  <li>The length of all sides  </li>
  <li>The coordinates of 2 points  </li>
  </ul>
  
  <p>I need to find the coordinates of the last point.</p>
  
  <p>The triangle is not necessarily a right triangle.</p>