This is, as noted, a possible duplicate of an existing question that asks why triangular cookies are called hamentaschen. If that's not the intent of this question, then I'm not sure what is (see also my comment above). I'm going to close it until such time as the asker clarifies his intent.
– msh210Mar 05 '12 at 02:12
Also possibly a duplicate of the later http://judaism.stackexchange.com/questions/15076
– msh210Mar 09 '12 at 00:21