The radii of the arcs increase according to the Fibonacci sequence (1,1,2,3,5,...). Calculate the combined length of the first 5 arcs of the spiral in terms of pi.

Thank you for the quick response. I'm assuming that you got 12 by adding the first 5 numbers on the Fibonacci sequence, which is the combined radii of the 5 arcs. Does 2*pi*(12) yield the combined circumfrences of each of the 5 arcs?

May 22nd, 2015

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