title: Find intersecting point of three circles programmatically
body: <p>As the title says,
  I have <strong>3 Circle</strong>. </p>
  
  <p>Each one have <strong>different radius</strong>. I know the radius of each circles.</p>
  
  <p>Also know the <strong>center points</strong> of each circle.</p>
  
  <p>Now I need to know how I can calculate the intersecting point of three circles programmatically, is there is any formula or something?</p>
  
  <p>It may look like below image
  <img src="https://i.stack.imgur.com/ClR0b.jpg" alt="enter image description here"></p>