



 
Hi Nivra, Assuming it is a regular octagon with interior angles of 135^{o} each, the area of an octagon is A=2(1+√2)t^{2} where t is the length of a edge (or side) of an octagon. The formula can be manipulated to solve for t: A/[2(1+√2)]=t^{2} √(A/[2(1+√2)])=t Hope this helps, Janice  


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