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Begin with the<br />
reverse side up,<br />
upslde down. Fold<br />
in half, short edge to<br />
short edge. Unfold.<br />
2 Fotd the teft <strong>and</strong> 5 Fotd the top<br />
right halves of the botup<br />
to the<br />
:il::'"<br />
remnant edges down,<br />
flush with the edge<br />
behind.<br />
Turn over. Fold up the bot- Turn over.<br />
tom edge. Use the rectangle<br />
at the back as a<br />
guide.<br />
Based upon a design <strong>by</strong> Ethan Plaut, 1998<br />
Modified <strong>by</strong> <strong>Richard</strong> L. Alex<strong>and</strong>er, 2006<br />
A taller step pyramid from three squares, developed <strong>by</strong><br />
Ethan Plaut, inspired this three-piece, modular construction.<br />
The resulting equilatera! triangles can be joined with others<br />
to make interesting tetrahedra, pyramids, <strong>and</strong> other more<br />
complex polygons.<br />
You will need three crisp dollar bills for this project.<br />
Fold up.<br />
Turn over.