Learn how to make a really fun geometric toy—a six-sided, six-faced flexagon called a hexa-hexaflexagon! It looks like an ordinary, two-dimensional, paper hexagon with a front and a back, but hidden inside are four more sides or faces that become visible by flexing the paper. There are many types of flexagons. The names of flexagons tell the type of polygon and the number of faces.
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Learn how to make a flexagon, a most fascinating geometric toy! It looks like an ordinary paper hexagon with a front and a back, but hidden inside is a third side or face that can be brought to the outside by flexing the paper. Flexagons are folded paper polygons that have the neat feature of changing faces as they are flexed.
There are many types of flexagons. The names of flexagons tell the type of polygon and the number of faces. In this project we make a tri-hexaflexagon—a six-sided polygon hexagon with three faces tri. Related crafts: Make a Hexa-hexaflexagon —it has six faces! Flexagons were discovered over fifty years ago by a graduate student, Arthur Stone, playing with scraps of paper. The first flexagon he made was the tri-hexaflexagon.
He had folded a strip of paper diagonally in three places to form a hexagon. When he flexed the hexagon in a certain way, a third face was revealed.
He found this to be very interesting. After thinking about it overnight, he constructed a hexagon that when flexed produced six different faces— hexa-hexaflexagon. After that many of his friends joined him in the fascinating study of flexagons, and many more types of flexagons were discovered.
Choose a tri-hexaflexagon to make. Download and print the pattern. You might want to start with the pattern with numbers on each face—1, 2 and 3. The Dots pattern coordinates with the dot patterns in the Geometric Solids craft project. On the Stars pattern, half of the fold lines are marked on each side, so you will need to score on both sides. It's best to make another pattern first for experience in scoring and folding. On the Equilateral triangle patterns, the fold lines are thicker than the lines for the individual, smaller triangles.
Patterns are Adobe PDF files. The Adobe Reader is available for free. All of Aunt Annie's project patterns are designed to be printed on standard letter-size paper 8.
Color the pattern template as you like with markers, colored pencils or crayons. Cut around the pattern on the outline. Try to make the cuts very straight and accurate. There will be one piece with twenty triangles. Make a double thickness by folding the pattern piece in half lengthwise and glue. To make a sharp, straight fold, first score on the fold line. To score: Use a ruler and the empty ballpoint pen or bone folder to make an indent along the fold lines. Score and fold back and forth on all the solid lines.
Do this for each of the 10 triangles of the tri-hexaflexagon. Place the folded pattern with the side without glue tabs facing up, and the end with a green 2 triangle to the left. Fold back on the line between the yellow 3rd and blue 4th triangles 1 and 3 —four yellow triangles 1s are together now.
Fold back on the line between the yellow and blue triangles 1 and 3. Now you should be able to see five yellow triangles 1s. Pull the yellow triangle 1 forward that is behind the green triangle 2. There should be six yellow triangles 1s on top and a blue triangle 3 to the side. Fold the blue triangle 3 back. Glue them together. Wait for the glue to dry before flexing your flexagon. Fold the flexagon to bring together three alternate corners of the flexagon.
The top of the flexagon will pop open if there is a new face to reveal. If it doesn't pop open, flatten the flexagon and try again with the other three corners. As you flex the flexagon in this project, see if you can find all the possible combinations of faces.
The tri-hexaflexagon has three faces in three combinations. That's it! Your flexagon is done! Related projects: To make a hexaflexagon with six faces, see the Hexa-hexaflexagons craft project. Make a hexagonal box to store your hexaflexagons or give a Flexagon Boxed Set as a gift. Enlarge Tip: The numbered patterns are geared towards classroom use. Enlarge Tip: Make a variety of flexagons to share with your friends. Enlarge Tip: Print the blank black and white pattern and decorate the faces any way you like!
Reveal hidden sides by flexing. Geometric Toys to Make. Enlarge Share this craft project. How to Make a Tri-hexaflexagon Read all of the steps before starting. Share this craft project with your friends and family. Share on Facebook. Tweet This. Save on Pinterest. Share via Email. Before you start: Make a place to work. Read all of the directions. Gather everything you need to do the project. Think about the project. Imagine how it will look and what you will do with it.
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A hexaflexagon also called a kaleidocycle is a folded geometric figure that can be "flexed" to expose many sides. This craft is a 3-D hexaflexagon, made of six tetrahedrons. To make a 3-D hexaflexagon, print out the template, cut and fold carefully, then tape or glue into shape. You can then "flex" the 3-D hexaflexagon, exposing each of four six-sided faces, one at a time. The hexaflexagon was invented in by the Princeton University graduate student Arthur H.
Learn how to make a flexagon, a most fascinating geometric toy! It looks like an ordinary paper hexagon with a front and a back, but hidden inside is a third side or face that can be brought to the outside by flexing the paper. Flexagons are folded paper polygons that have the neat feature of changing faces as they are flexed. There are many types of flexagons. The names of flexagons tell the type of polygon and the number of faces. In this project we make a tri-hexaflexagon—a six-sided polygon hexagon with three faces tri. Related crafts: Make a Hexa-hexaflexagon —it has six faces!