Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole
ISBN 10: 1439047901
ISBN 13: 978-1-43904-790-3

Chapter 6 - Section 6.4 - Some Constructions and Inequalities for the Circle - Exercises - Page 314: 9

Answer

The tangent is in red in the attached picture.

Work Step by Step

First, draw the circle, placing point O at the center. Then, recall that the tangent to the circle through D is the line that is parallel to the circle when it goes through point D.
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