Label a point D outside AABC so that AD WY and ZDAB ZYWX. Since WX AB, AWXY AABD by Now, let E be the point where the angle bisector of ZCAD intersects BD. By the Reflexive Property, AE Since AE bisects ZCAD, ZCAE E V Because AD WY, AD = V Thus, AACE AADE by ▼ Since ΔACE스 ΔADE, CE 스 V By the Segment Addition Postulate, DB = + EB, and since CE DE, DB = + EB. By applying the Triangle Inequality Theorem to ABCE, CE + EB VBC. This means that V> BC. Because AWXY AABD, by CPCTC, XY = V and XY > BC.
Label a point D outside AABC so that AD WY and ZDAB ZYWX. Since WX AB, AWXY AABD by Now, let E be the point where the angle bisector of ZCAD intersects BD. By the Reflexive Property, AE Since AE bisects ZCAD, ZCAE E V Because AD WY, AD = V Thus, AACE AADE by ▼ Since ΔACE스 ΔADE, CE 스 V By the Segment Addition Postulate, DB = + EB, and since CE DE, DB = + EB. By applying the Triangle Inequality Theorem to ABCE, CE + EB VBC. This means that V> BC. Because AWXY AABD, by CPCTC, XY = V and XY > BC.
Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter1: Line And Angle Relationships
Section1.2: Angles And Their Relationships
Problem 10E: Suppose that AB,AC,AD,AE, and AF are coplanar, Exercises 10-13 Classify the following as true or...
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