When you click the sharing icon the URL on the clipboard points to a copy of GxWeb containing your work which is saved in the cloud. The icon changes to a  clipboard and you can PASTE (ctrl-V) it into your emails and documents.

 We've made an example to share with you and your friends.  (Click the title or the image below.) 

              Using a Parabola to Approximate a Circular Arc

Sometimes you want to use a spline to approximate a circular arc.  How close can you get?  Here is a model with an answer:

Open the symbolic panel to see an expression for the distance between G and A.

The numeric panel subtracts the radius (1) to give the distance of G from the circle.  This represents the error of the approximation.

What is its value if theta is 90 degrees?  45 degrees? 20 degrees?  10 degrees? 

Get a sampling of our latest geometry videos on YouTube 

   Geometry Puzzle Books make a great present!

Solve these puzzles using only 3 simple geometry theorems, but how and when to apply them may become more challenging as you progress through the books.   These are great collections to engage you over the winter holiday! 

Some links and YouTube demos on our products