Gregs Swing

We met Greg Frederickson in August 2002.

Greg is the author of a wonderful book “Dissections: Plane & Fancy”. We got the idea of dissecting pentominoes from this book.

He showed us his second book, “Hinged Dissections: Swinging & Twisting” which is about ‘hinged dissections’
 

Greg gave us a beautiful present, which we want to show to you all.
The pentominoes-swing consists of 20 congruent right isosceles triangles, they are glued together with adhesive tape.

Triangle 1 is glued to triangle 20, so forming a sling of triangles. You can try making it from paper, but ours is made of beautiful cherry wood.

With a bit of practice you can use the swing to make any pentomino!