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May 4th, 2012, 01:26 PM   #1
Math Team
 
Joined: Dec 2006
From: Lexington, MA

Posts: 3,267
Thanks: 408

Impossible object


Here's something to drive your friends crazy.


Take a 3-by-5 file card and cut it on the solid lines.
Crease it on the dotted line.

Code:
      *---*-------*---*
      |   |       |   |
      |   |   C   |   |
      |   |       |   |
      |   |       |   |
      * - * - * - * - *
      |       |       |
      |       |       |
      |   A   |   B   |
      |       |       |
      *-------*-------*
Hold section C with your right hand; let the sheet hang vertically.
Hold section A with your left hand and swing it 90 degrees toward you.

Now hold section C with your left hand.
Hold section B with your right hand and swing it 90 degrees away from you.


You will have an object that looks like this:

Code:
                      *---*   *-------*
                     /   /   /       /
                  *-------* /       /
                  |       |/       /
                  |       |       /
                 /|       |      /
                / |       |     /
               /  |       |    /
              /   * - * - *   /
             /       /   /   /
            /       /   /   /
           /       /   /   /
          /       /   /   /
         /       /   /   /
        *-------*   *---*
After you've marveled at how impossible it looks,
[color=beige]. . [/color]give it to your best friend.
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