Show that the area K of triangle PQR is K = rs, where s = (a +
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Show that the area K of triangle PQR is K = rs, where s = ½(a + b + c). Then show that
The lines that bisect each angle of a triangle meet in a single point O, and the perpendicular distance r from O to each side of the triangle is the same. The circle with center at O and radius r is called the inscribed circle of the triangle (see the figure).
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