## Posts Tagged ‘geometry’

### Two More Impossible Cylinders

Posted by: **Dave Richeson** on October 2, 2016

### Measuring Tapes for Circles and Spheres

Posted by: **Dave Richeson** on April 21, 2016

### A Geometry Theorem Looking for a Geometric Proof

Posted by: **Dave Richeson** on March 23, 2016

### Using a kayak to measure the perimeter of a lake

Posted by: **Dave Richeson** on July 4, 2013

### Puzzler: a squarable region from Leonardo da Vinci

Posted by: **Dave Richeson** on June 18, 2012

### Angle trisection using origami

Posted by: **Dave Richeson** on June 1, 2012

### The Japanese theorem for nonconvex polygons

Posted by: **Dave Richeson** on June 22, 2011

### Albrecht DÃ¼rer’s ruler and compass constructions

Posted by: **Dave Richeson** on March 22, 2011

### Lincoln and squaring the circle

Posted by: **Dave Richeson** on February 18, 2011

### Three geometric theorems

Posted by: **Dave Richeson** on December 24, 2010