Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10: 9781285195698
ISBN 13: 978-1-28519-569-8

Chapter 6 - Review Exercises - Page 307: 29


By the definition of a midpoint, it follows that because C is the midpoint of AB, AC and BC must be congruent. As a result, we know that the corresponding arcs AC and AB are congruent, for the length of the chord is directly proportional to the length of the corresponding arc. Since the length of the corresponding arc is directly related to the length of the angle created by the tangent line, it follows that angle CPB is congruent to CPA. Thus, by the definition if an angle bisector, line segment CP is an angle bisector.
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