Instructables
Picture of Riddler Hat!
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I've been wanting to make this hat for a while now, but the Game LIfe contest finally gave me an excuse to do it! So, I began cutting out cardboard triangles to make the hat. I cut out 51 triangles before I realized I was making a bowl, not a hat. The 2-hour long mess up made me realize that I could put this in the Make to Learn contest as well.

What did you make? 
I made the hat that the Batman villain, Riddler, wears in the game Arkham City. I used cardboard and duct tape.
How did you make it?
I wanted to make a bowler hat because I usually make duct tape top hats (I might make an Instructable later) and wanted to try something different. I made it the Riddler hat because the Riddler is one of my favorite Batman villains. I was making it out of triangles, but I later changed my plans and made it work.
Where did you make it?
I worked on it at home over the span of two days.
What did you learn?
My biggest challenge was restarting after spending 2 hours cutting out triangles. I'm proud that I was able to create a different kind of hat from my usual (I have 9 top hats). If I had to do it again, I would figure out what to build it out of ahead of time.


To make this hat, you will need lots of cardboard, green, purple and black duct tape, scissors, and patience.

Step 1: Making Stencil #1

Picture of Making Stencil #1
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Figure out how tall you want the rectangle of the stencil to be. Then, draw on paper, a rectangle with that height and a width of one inch. Now, take the circumference of your head, and divide it by 3.14. This is the diameter of your head. Divide that by two to find the hypotenuse of the triangle part. Draw the triangle on top of the rectangle. Cut out a bunch of these pieces. I only used 16.
 
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