The Shoemaker's Knife

Tópico:Área

The area enclosed by the semi-circles centred O, X and Y and on the same diameter is called the Shoemaker's Knife. The radii of the two smaller semi-circles are variable. This is illustrated in the diagram below.

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Angles of Intersecting Lines
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Graph of y = ax² + bx + c

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inscribed angle on semicircle
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