Triangle With Bisectors of Base Angles

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Illustration to show if the bisector of the base angles of a triangle are drawn, and through their point of intersection a line is drawn parallel to the base, the length of this parallel between the sides is equal to the sum of the segments of the sides between the parallel and the base.


G.A. Wentworth Plane And Solid Geometry (Boston: Ginn & Company, 1899) 72


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