## Fix your floppy pizza slice with Gaussian curvature

It turns out that folding a pizza slice lengthwise to improve its rigidity is a great example of the "Remarkable Theorem" by Gauss. Cliff Stoll explains. Read the rest

## Site finds the "visual center" of your images

Visual Center is a website that takes an image and attempts to find its compositional center point. It works well with designy images that have an obvious geometry to them and well-defined shapes to find and center — think logotype surrounded by whitespace. I'm not having a lot of success with photographs, though. [via] Read the rest

## What's the best way to distribute numbers on the faces of a D120?

Exotic polyhedron purveyor Dice Lab's crowning randomizer is its monstrous, \$12 120-sided die. Read the rest

## How to draw Islamic geometric patterns

Over at the Root Simple website, Mr. Homegrown wrote about the fun he's been having learning how to draw Islamic geometric patterns from this book by Eric Broug.

It’s a book of step by step drawing instructions. All you need is a ruler, compass, pencil and pen. While the geometry behind theses patterns is enormously sophisticated, actually drawing out the shapes is surprisingly easy and relaxing. It’s also a fun and painless lesson in geometry, especially for those of us not inclined towards math..

## Watch this elegant dance of triangles by animator René Jodoin (1966)

From 1966, René Jodoin's beautiful minimalist animation of a geometric ballet, "Notes on a Triangle." Jodoin, who died earlier this year, was founder of the National Film Board of Canada's animation studio. "Note on a Triangle" was only one of several films meant as an introduction to geometric forms. See more here.

## The geometric horror game Euclidean is Lovecraft levels of scary

Tentacles made of cubes reach for you from within the watery abyss. "You're not supposed to be here," an unseen being informs you as you descend into the first level of the game Euclidean. Deep sea creatures made of shapes swarm, pulse and strain around you—and soon, they notice you. "Everything here will kill you," the voice intones a few moments later. Read the rest

## The geometry of fireworks

“Enjoy the parabolic envelopes that form while those bright, sparkling, parabolic curves are etched into the sky tonight.”

## 3D printed dress made from 2,279 triangles and 3,316 hinges

Designer Jessica Rosenkrantz writes, "I made this 3D printed dress and the MoMA just acquired it. This video, filmed at Shapeways factory showing the printing and depowdering of the dress (there's also this one, documenting the dress's sounds and movements). Read the rest

## Let the People Draw the Lines Act: longshot bill to fight gerrymandering

Let the People Draw the Lines Act, a bill introduced by Alan Lowenthal (D-CA), would appoint panels of independent experts to adjust electoral district boundaries in an attempt to remove the "safe seats" created through gerrymandering, by which electoral districts are torturously redrawn to include as many voters likely to keep the incumbent in and to exclude everyone else. As Wonkblog explains, the bill is a long-shot, but it's also a shining example of the kind of legislation that fights corruption and creates a climate of real representative democracy. The fact that this bill is wildly unlikely to pass doesn't make it laughable: it makes Congress irredeemable. Read the rest

## Cookie geometry with Vi Hart

Vi Hart, the Internet's favorite manic vlogging mathematician, has released a new video in which she teams up with math artists Andrea Hawksley and Gwen Fisher, and Gwen's sister Ruth of Sweets by Ruth. The four of them bake satisfyingly precise and geometric gingerbread polygons, then build up a variety of astounding three dimensional forms by piecing them together with icing. The video is both hunger-inspiring and brain-inspiring, and is likely to be the best thing you watch this week.

## Penrose Stars animated GIF

"Penrose Stars", a GIF created by davidope and inspired by the famed impossible object, the Penrose stairs. See more of dvdp's abstract GIFs here. (via Imaginary Foundation) Read the rest

Fdecomite has revisited his tessellated Escher cookie-cutters, with a new set of cutters and some new baking that he's posted to the Boing Boing Flickr pool.

In the Boing Boing Flickr Pool the fractal-obsessed Fdecomite posts the latest iteration in a series of experiments with tessellated, Escher cookie-cutters. Bake-time expansion creates irregularities that lead to a chewy (literally) series of interlock-imperfections, which give old MC's classic a bio-organic air that rather invigorates it.

You can 3D print interlocking lizard cutters with a free model from Thingiverse. Fdecomite, if you're reading this, please post in the comments with a link to the cookie cutters you used here!

Update: From the comments, Fdecomite writes, "Hi, those are cookie cutters I made from aluminium foil.I also made some 3D printed Escher cookie cutters you can find in my Shapeways shop.

## Goldberg polyhedra field guide [Video]

This guy sure knows how to have fun with Goldberg polyhedra! Read the rest

## Triple-nested Klein bottle

Here's glassblower Alan Bennett's astounding triple-nested Klein bottle, a beautiful thing:

A single surface model made by Alan Bennett in Bedford, United Kingdom. It consists of three Klein bottles set inside each other to produce, when cut, three pairs of single-twist Mobius strips. A Klein bottle has no edges, no outside or inside and cannot be properly constructed in three dimensions.

(Image: Science Museum/Science & Society Picture Library) Read the rest

## Celebrate "Pi Day" by throwing hot dogs down a hallway

No, that's not a euphemism for anything. Buffon's Needle is an 18th-century experiment in probability mathematics and geometry that can be used as a way to calculate pi through random sampling. This WikiHow posting explains how you can recreate Buffon's Needle at home, by playing with your food. Read the rest

## 3D printed vegan Kosher Moebius bacon

Infinite bacon is now possible direct from Shapeways 3D printers.