Lines Drawn From the Point C to the Extremities of the Straight line AB

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Illustration showing two lines CA and CB drawn from the point C to the extremities of the straight line AB. OA and OB are two lines similarly drawn, but included by CA and CB. This can be used to show the theorem: The sum of two lines drawn from a point to the extremities of a straight line is greater than the sum of two other lines similarly drawn, but included by them.




G.A. Wentworth Plane And Solid Geometry (Boston: Ginn & Company, 1899) 22


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