sequences figure shows several terms sequence consisting alternating circles and squares eac

(Sequences) The figure shows several terms of a sequence consisting of alternating circles and squares. Each circle is inscribed in a square and each square (excluding the largest) is inscribed in a circle. Find the relationship between Sn and Cn and between Cn and Sn+1. What portion of the largest square is shaded in the figure? Figure and full question found here:

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