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Awesome Geometry

Recursive Gear Racks

Recursive Gear Racks

Mathematician and maker Henry Segerman shows off more of his fascinating interactive mechanisms. This series of interlocking straight gears uses a rack-and-pinion mechanism to transmit motion. Henry posted the models to 3D print your own recursive racks on Printables.

Horizon Helvetica + Key

Horizon Helvetica + Key

This duo of stainless steel tools helps with measuring, drawing, and other everyday tasks. The wallet-friendly Horizon Helvetica features inch, cm, pixel, and pica rulers, a compass, a protractor, a t-square, a set square, and an isometric grid. Its sibling, the Horizon Key, has a bottle opener, hex bolt wrenches, a mini saw, a spoke wrench, a screwdriver, and more.

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Making a Square-Wheeled Bicycle

Making a Square-Wheeled Bicycle

There’s a good reason that wheels are round: friction. But basic physics are never going to stand in the way of mad builder The Q. His latest creation is a standard bike frame with one major modification – it rolls on custom-made square wheels. It rides pretty smoothly, but it also doesn’t work how we assumed it would.

This Is Not a Circle

This Is Not a Circle

Most of us are familiar with pentagons, hexagons, and octagons, but did you know there’s a name for a 1000-sided shape? Thanks to its numerous vertices, the chiliagon looks like a circle to the naked eye and only reveals its true nature when viewed close up. Micheal from Vsauce offers a quick take on this unusual shape.

Bending a LEGO Sphere

Bending a LEGO Sphere

We’ve been spellbound by the many unconventional LEGO structures posted on the Brick Bending channel. For this creation, they linked together 3696 1×2 plates with 72 2×2 plates to create a spherical rhombicuboctahedron. You’d never know where this build was going if we didn’t tell you first.

Why Penrose Tiles Never Repeat

Why Penrose Tiles Never Repeat

Penrose tiles are a kind of arrangement in which polygons create patterns that never repeat. Minutephysics teamed up with Aatish Bhatia to explain the grid that underlies Penrose tiles and the math and geometry that prevents repetition. You can play with Penrose and similar patterns on Bhatia’s Pattern Collider.

Making Patterns with LEGO Gears

Making Patterns with LEGO Gears

Rapidly spinning objects can result in some cool, Spirograph-like patterns. LEGO mechanical builder Yoshihito Isogawa shows how different arrangements of LEGO Technic gears create different geometric patterns when spun in front of a camera’s lens. It would be interesting to see some larger and more complicated designs.

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Robot vs. World’s Hardest Jigsaw Puzzle

Robot vs. World’s Hardest Jigsaw Puzzle

A while back, Stuff Made Here showed off an early version of his robot that could solve simple jigsaw puzzles. After refining the robot’s hardware and rewriting its puzzle-solving algorithm, he turned it loose on a 4000-piece puzzle with only white pieces. Oh, and he had to move his entire shop in the middle of the project.

Exlicon MX Drawing Tool Set

Exlicon MX Drawing Tool Set

This set of drawing tools makes it easy to create precise shapes. By combining its parts, you can draw circles, hexagons, triangles, squares, and more. Use it to measure angles with its protractor or long lines with its rolling ruler. Its extendable ruler can be used to draw objects from 0.4″ (10mm) to 18.7″ (475mm) in diameter.

Triangle Playing Cards

Triangle Playing Cards
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Who says playing cards need to be rectangular? Home Run Games sure doesn’t. Their unique 3-sided cards feature unusual arrangements of symbols and court images, adapted to fit into the triangular constraints. They’re printed on casino-grade linen paper and come in red, blue, or a special limited-edition.

Crushmetric Switch Pen

Crushmetric Switch Pen

Building on his own his series of dented can sculptures, artist Noah Deledda applied the idea to something you can enjoy every day. The Crushmetric pen changes from a smooth form, to a deeply-faceted pattern with the push of a button. It’s available in a silver or holographic finish. The Action Lab explains how it works.

The Circle

The Circle

Barcelona design studio Six N. Five takes us on a journey through time and space represented as a circle moving through various locations. Director Ezequiel Pini says “We are a circle, without boundaries, beginning or end. Infinity, Unity, connection, just a circle in expansion.” Part of the Moco Museum collection.

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Squaring a Circle

Squaring a Circle

At first glance, this object looks like a square, but with a quick rotation it transforms into a circle. Physicsfun shows off this intriguing optical illusion created by Matt Enlow. When viewed from the side, you can see it’s actually madeup of four identical parabola segments. A 3D print of the model is available from Shapeways.

Phi Ruler 2.0

Phi Ruler 2.0

Not to be confused with the Phi Ruler, this drawing tool offers another method for drawing with the Golden Ratio, a mathematical ratio known for its ability to produce images and objects with harmony, balance, and structure. The Phi Ruler 2.0 comes in three sizes and in clear or a Bauhaus-inspired color scheme.

5-Axis Moving Rack Sculpture

5-Axis Moving Rack Sculpture

Inspired by the geometric star art of John and Jane Kostick, mathematical artist Henry Segerman shows off a neat bit of mechanical engineering which uses a set of five geared racks that can smoothly slide through each other. The model is available as a 3D print from Shapeways, but it’s not cheap.

Lunark Origami Lunar Tent

Lunark Origami Lunar Tent

SAGA is developing an innovative shelter design that could be used by astronauts on the moon. Designed to survive extreme weather conditions, it packs up small for transit and expands to more than five times its original size when opened up. It’s designed to land on-site fully outfitted with furniture, food, water, and resources.

AlgoLoop Marble Toy

AlgoLoop Marble Toy
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Mathematician and creator Yosuke Ikeda invented this glorious little plaything which uses a series of ramps to move marbles around as you push on it. Multiple AlgoLoops can be combined for more complex patterns. The project’s Kickstarter already has closed, but hopefully we’ll be able to buy these soon.

DeepLight 12 Dodecagon Light

DeepLight 12 Dodecagon Light
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Artist David Hughes created this incredible light-up showpiece using bespoke 2-way glass mirrors to produce an endless array of patterns. Its custom circuit boards power 960 colorful LEDs, which come to life to produce its hypnotic designs. It’s built with a sturdy, anodized aluminum frame and is limited to 500 pieces.

Brick Bending a LEGO Wheel

Brick Bending a LEGO Wheel

YouTube channel Brick Bending specializes in creating unexpected geometries using LEGO bricks. This satisfying video shows how they built an oversize wheel using three kinds of hinged components in a repeating pattern. We imagine you could use this method to build a wheel as large as you want, given enough bricks.

Elliptical Pool Table

Elliptical Pool Table

Frustrated by missing shots on a regular pool table, The Q went ahead and built himself a special kind of pool table where the ball goes in the pocket virtually every time. The trick is its elliptical shape, which sets up the perfect bank shot at every angle. This video from Numberphile explains the geometry at work.

Making a Magnet Cuboctahedron

Making a Magnet Cuboctahedron

Magnetic Games presents yet another wonderfully satisfying video, in which he uses hundreds of magnetic rods and spheres to create an complicated geometric sculpture. He placed a light at the center of his masterpiece, so it casts interesting shadows as well. After it’s all done, he knocks it down with a catapult.

The Infinite Pattern

The Infinite Pattern

Are you craving your daily dose of math and science? Veritasium is here to fill our brains with all kinds of interesting facts about geometry and patterns, eventually leading to a demonstration of interlocking tiles that can extend infinitely across a plane without ever repeating their layout.

Adam Savage Builds a Hyperdodecahedron

Adam Savage Builds a Hyperdodecahedron

Tested’s Adam Savage got his hands on the Zometool Hyperdo, an incredibly complex building kit based on a 4D object known as a hyperdodecahedron. The 120-cell object is made up from 640 struts and 330 connection nodes. It requires a lot of time and patience to assemble, but the end result is worth it.

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