An equilateral triangle is inscribed in a circle of radius r. See the figure in Problem 16.

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An equilateral triangle is inscribed in a circle of radius r. See the figure in Problem 16. Express the area A within the circle, but outside the triangle, as a function of the length x of a side of the triangle.


Data from problem 16

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Precalculus

ISBN: 978-0321716835

9th edition

Authors: Michael Sullivan

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