Pentagon

White Hat Hacking : Hack the Pentagon?

The Null Byte community is all about learning white hat hacking skills. In part, this is because I believe that hacking skills will become the most valuable and important skill set of the 21st century. This week, The U.S. Department of Defense confirmed my belief by announcin ...more

How To : Fold a pentagon out of paper

This video tutorial shows how to fold a paper pentagon out of A4 sized paper. Instructions for how to convert North American Letter sized paper into A4 size paper are also included. The paper pentagon serves as a base for a paper dodecahedron, which can be made by attaching al ...more

News : Pentagon Funds Real Life Spider-Man Technology

Chemical engineers at Cornell have created a small device that may one day turn troops into real life spider-men. The device would cradle in the palm of the hand, allowing troops to scale walls. It uses an adhesive inspired by the Floridian leaf beetle, an insect that "can adh ...more

How To : Play the Pente (Pentagon) marble game

In this Games video tutorial you will learn how to play the Pente (Pentagon) marble game. It's a game of skill and strategy played on a 14" square hardwood game board. It can be comfortably played by 2 people or two teams. Teams do not have to be balanced (two against one, thr ...more

How To : Cut a pentagon from a square piece of paper

Cut a perfectly balanced pentagon from a square piece of paper! You can do this without measuring or drawing. Fold your square of paper as outlined in this tutorial, and then cut along several of the fold lines to end up with a pentagon!

How To : Perform the Pentagon Display card flourish

Show off your card trick skills with a little XCM (extreme card manipulation). This video tutorial will show you how to perform the Lang-Pentagon Display card flourish. There's no magic involved here, just some card manipulation for a great show. The card flourish is a techniq ...more

News : Pentagon Searches for Perfect Body Extraction Bot

Rescuing wounded soldiers in a war zone is extremely dangerous. Again, (previous entry, Futuristic Warefare), the Pentagon turns to scifi technology and robotics for the answer. The current solution is to develop robots that perform as "combat casualty extraction system[s].” A ...more

How To : Create Parabolic Curves Using Straight Lines

Curve stitching is a form of string art where smooth curves are created through the use of straight lines. It is taught in many Junior High and High School art classes. I discovered it when my math students started showing me the geometric art they had created. The process of ...more

Advice from a Real Hacker : The Top 10 Best Hacker Movies

In recent years, Hollywood has taken a shine to hackers, with hackers appearing in almost every heist or mystery movie now. This can be both good and bad for our profession. As we know, whichever way Hollywood decides to depict our profession is how most people will perceive i ...more

News : Making Art with the Golden Ratio

You can do some pretty cool stuff with the golden ratio. The image above is made from taking each quarter-circle in the golden spiral and expanding it into a full circle. In the second image, the spiral and the golden rectangles are overlaid on the the first image, showing how ...more

How To : Make a 3D five-point star from paper with origami

This video shows how to make a 3D five point paper star. First cut a pentagon using a sharp flat blade and a ruler. Folding halfway between each two corners to the opposite corner. These folds are the points of the star. Make a mark half-way between the edge of the paper and t ...more

How To : Make a big 3D paper star out of newspaper

Paul shows us how to make a gigantic three dimensional five-point star out of paper. First, glue A4 sized paper together to make a long strip. Make a U-shape on one end, cross the shorter end under the strip and make a knot by placing the end into the loop. The knot now looks ...more

How To : Make a Sonobe Jasmine Dodecahedron

Math Craft admin Cory Poole posted instructions on How to Make a Cube, Octahedron & Icosahedron from Sonobe Units, plus some great complex models in his article, How to Make a Truncated Icosahedron, Pentakis Dodecahedron & More. These models use the standard sonobe unit and a ...more

How To : Make Yin-Yang Modular Polyhedra

Last Thursday's post demonstrated how to Make Yin-Yang Pillow boxes, which were based on equilateral triangles and squares. The units for making these boxes were created by Phillip Chapman-Bell, who runs an amazing origami blog and has a spectacular flickr photostream. Using t ...more

How To : Make flowers out of balloons

Make flowers out of balloons There are three balloon flowers attached to a base at the bottom. The largest balloon is pink in the sunflower design. It has a green stem attached. There is the basic flower design with pentagon shaped balloons attached. There are two of these in ...more

How To : Work with tessellation shapes in geometry

Not all polygons are tessellation shapes. A tessellation is a collection of figures that can be put together to fill a plane surface without overlaps or gaps. I’m sure that you have already seen many tessellations in real life. The tiles in the kitchen and the puzzle you have ...more

How To : Find the volume of pyramids in geometry

A pyramid is a three-dimensional figure with a polygonal base and a vertex. The base can be a triangle, quadrilateral, pentagon, hexagon, or other type of polygon. The volume of a pyramid is given by the following formula: V = (Area of the base x h)/ 3 Since the volume of a ...more

How To : Make a buckyball from folded paper with origami

To create an origami buckyball, you must start with a piece of paper cut into a triangle with each side about two inches long. Fold the corner of each side into the middle of the opposite side and then unfold to create creases that will be your guide. Next, fold a side up to t ...more

How To : Make a lucky star from folded paper with origami

A demonstration on how to make a lucky star from folded paper with origami is shown in this video. For this you need to get a strip of paper. Attractive papers are available at the stores for this. First to start up take an end of the strip of paper and tie a knot, flatten it ...more

How To : Make a pentakis dodecahedron out of balloons

The amateur shows how to make a pentakis dodecahedron of balloons. This balloon has 90 bubbles and is made out of six balloons. Its a good balloon exercise to do to challenge your balloon making skills. On the shape there are either six or five balloons meeting in one space. I ...more

How To : Find the surface area of a pyramid with BabelMath

A pyramid is a three dimensional figure with the base in the form of a triangle and three slant sides to it. To find the surface area of a pyramid you have to find the area of the different pieces that make it up. The pyramid base can be triangle or even other geometric figure ...more

How To : Work with polygon geometry names

Watch this video to learn the important polygon names and how to classify different types of polygons. Polygons are closed plane figures formed by segments. They can be classified based on the number of sides (or angles) they have. A polygon with two sides doe not exist. A t ...more

How To : Decorate cupcakes for your favorite sport

In this video, we learn how to decorate cupcakes into sports balls. To do this, start with pre-made cupcakes, any flavor you like. Let the cupcakes cool, then add a layer of vanilla frosting to each of them. If you want baseballs you will use black red and blue icing to pipe 2 ...more

News : A Sneak Peek into Apple's New Campus

A raw video shot by Jason McMinn, using a GoPro mounted to a helicopter drone, gives us a look at Apple's new campus, currently under construction in Cupertino. Video: . The 8-minute video shows a huge construction site of "Campus 2," complete with a Pentagon-esque circular bu ...more

News : Obama asked for military options in Syria

THE Pentagon's top two officials have revealed that President Barack Obama had asked for preliminary military options to respond to the Syria conflict but the administration still believed diplomatic and economic pressure was the best way to protect Syrians from the Assad gove ...more

News : News Clips - June 14

An amazing amount of news this week; new proposals and new agreements have sprung up. But so has our "need" to spread our presence. The military warns of another war, while 26 congressmen decry the use of drone strikes. Read on: Plans for Syria? CNN reports this afternoon th ...more

News : News Clips - July 10

» Video Blogger Documents Expanding TSA expansion. The TSA is continuing its expansion from airports to train stations and other modes of transportation. On Monday, an independent journalist posted a video documenting TSA agents setting up shop at Union Station in Chicago. Oba ...more

How To : Carve Polyhedral Pumpkins

Halloween is coming up, so many of you may have a need or desire to carve a pumpkin and turn it into a Jack O' Lantern. This week we are going to explore carving our pumpkins into interesting geometric shapes. In this post, we will carve the pumpkins into spherical versions of ...more

News : Twisted Small Stellated Dodecahedron Tensegrity

This is a zigzag tensegrity based on a small stellated dodecahedron. There are string pentagons on the outside of the model where the vertices have opened. It is made of thirty units, consisting of a barbecue stick pair with a loop of elastic. The stick pairs are all "floating ...more

How To : Origami Buckminster Fuller molecule balls

This video provides instruction on how to make "buckyballs" (dodecahedron, truncated icosahedron) from "PHiZZ" units. It looks complicated but it is really easy to make. You can fold it from standard square memo pads and do something else at the same time as these PHiZZ units ...more

News : 180 Unit Sonobe Buckyball

I wondered how silly you could get with sonobe, and had a bash at a buckyball, which is a fullerene (technically a truncated isocahedron; you can see a simple model here). It's twelve pentagons—each surrounded by 5 hexagons (20 in total)—making a football shape in England or a ...more

News : My Sonobe Jasmine Dodecahedron

Here's my Sonobe Jasmine Dodecahedron built from Imatfaal's instructions. I built it using "cheap" patterned origami paper (150 cm so I could use Imatfaal's measurements) from Michael's. I then took some silver metallic leafing paint and painted the exposed white parts with s ...more

News : Geodesic Gingerbread House

Came across this gingerbread house while browsing the web. Looks like you bake the gingerbread in hexagons and pentagons, and then "glue" them together with icing. Very cute!

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