A spiral is made up of successive semicircles, with centers altern | Filo
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A spiral is made up of successive semicircles, with centers alternately at A and B, starting wit center at A. of radii as shown if figure.  What is the total length of such a spiral made up of thirteen consecutive semicircles?
{Take "pi")
{ Hint:- Length of successive semicircles is with centers at A, B, A, B,....., respectively, }

Solution: are the semicircles with centers at A and B with radii




The radii are in AP

Total length of the spiral
Circumference of a semicircle
Total lenght of the spiral

                                           

Total length of spiral
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