Euclid's Muse

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by Nick Halsey

Tridecagon Diagonals, Circles and Tangents

You'll want to start out with the heptagon and work your way up. This one's the same as all the others, just with a 13-sided regular polygon. Observe the tangencies to diagonals of circles centered at intersections of diagonals, when the circles are resized (by dragging). This is a smaller version that works well on most monitors (zoom in with two-finger touch). Bigger version here.
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.  

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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.

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