



 
Hi Jon, Here is a piece of an nsided regular polygon with an inscribed circle of radius r units and centre C. Since the polygon has n sides the measure of the angle BAC is 360/n degrees. Thus the measure of the angle DCA is 180/n degrees. If the length of the side AB of the polygon is s units then the length of AD is s/2 and
Hence
and
You have s = 6 inches and r = 26/2 = 13 inches so
So 14 bricks should be sufficient. Harley  


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