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The missing solution

b ii) Let the diameter of the semicircle PQR = d

Then, d = d₁+ d₂+ d₃…….. d_n x π

π d = πd₁+ πd₂+ πd₃…….. πd_n ÷ 2

π d/2 = πd₁/2 + πd₂/2 + πd₃/2 …….. πd_n/2

Length of the arc of the outer semicircle = length of arcs of the inner semicircle 1

+ length of arcs of the inner semicircle 1

+ length of arcs of the inner semicircle 1

+ ……+ length of arcs of the inner semicircle n

c) For any value for the outer semicircle, it depends on the diameter of the circle. Therefore, the generalization from bii) it true for every value of the diameter so that the length of the outer semicircle is the same with the total length of the inner circle