Problem
of the
Week

PROBLEM 173
 

Can you fill up an equilateral triangle with circles of equal size?  

More precisely, take an equilateral triangle of side length 1 and fill it with a stack of equal-sized circles as shown.  The figure show T4, a stack based with four circles.  As the number of circles in the base grows, do the circles eventually fill up the triangle; that is, does 

limn® ¥ area (Tn) = area of the triangle? 

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ã2003 Alberto L. Delgado