The Eyeball Theorem

Draw tangents from the centers U and V of the circles to the other circle. Then the lengths of AB and CD are equal.
You can drag the orange centers or use the sliders to change the figure.

SNAPSHOTS

  • [Snapshot]
  • [Snapshot]
  • [Snapshot]
    • Share:

Embed Interactive Demonstration New!

Just copy and paste this snippet of JavaScript code into your website or blog to put the live Demonstration on your site. More details »

Files require Wolfram CDF Player or Mathematica.