Elementary Geometry for College Students (5th Edition)

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

Chapter 6 - Section 6.1 - Circles and Related Segments and Angles - Exercises - Page 286: 15a



Work Step by Step

Since $OC$, $OA$, and $OB$ are all radii, they are all congruent. So... $OC=OA=OB=6$ $OA+OB=AB$, therefore $AB=12$
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