A shape resembling a shoemaker’s knife is constructed from a semicircle with diameter a with two semicircular “bites” of diameters b and a-b.
Write a function to compute the area Ak of this shape as well as the area Ac of a circle with diameter c, the length of the line tangent to the two smaller semicircles and touching the edge of the largest semicircle.

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Last Solution submitted on Jun 03, 2026

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