Euclid's Muse

your source for INTERACTIVE math apps


Create an Account
by Nick Halsey

Circles, Tangents and Nonagon Diagonals

You may want to see the heptagon version before attempting this one Every diagonal within a regular nonagon is drawn. Circles are centered at each intersection of diagonals along a vertical axis (these same constructions can be made nine times around the nonagon). Each circle can be tangent to at least 4 diagonals when the circle is at least 2 different sizes. Unnecessary diagonals have been hidden. Drag the green points to resize the circles. Can you find all 13 positions where a circle is tangent to at least 4 diagonals? Hint: sometimes the circle is not entirely contained within the nonagon. Ready for more? Check out the hendecagon version!
by Saltire Team

Reflection Clock

You can reflect the triangle in the minute hand, then reflect the reflection in the second hand.  How long does it take to do a complete rotation? You can change the triangle by dragging the red points.  

Please Log In


Welcome to Saltire Software’s app repository: Euclid’s Muse. This site features hundreds of free math apps created by our users. Upload, share and discuss your favorite apps created with Geometry Expressions. Join today and add to the collection.

News

Hacked By XwoLfTn

Hacked By XwoLfTn Long life for Tunisia  long life to Palestine ./Exit  

Updates to Euclid’s Muse

We are excited to announce some of the recent updates to Euclid’s Muse vente de viagra sur internet. The front page has been reorganized so it’s easier to find what you’re looking for (and it’s much nicer to look at). Join us on the new forums page and help build our community by posting your […]

View the News Archives

Login or Sign Up

Please create an account to get started.


© Saltire Software Terms and Conditions