Concept explainers
Inscribed Circle For Problems 55-58, the lines that bisect each angle of a triangle meet in a single point , and the perpendicular distance from to each side of the triangle is the same. The circle with center at and radius is called the inscribed circle of the triangle (see the figure).
Use the result of Problem 55 and the results of Problem 60 and 61 in Section to show that
where .
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