Elementary Geometry for College Students (7th Edition)

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 6 - Section 6.1 - Circles and Related Segments and Angles - Exercises - Page 285: 12b

Answer

measure of arc $DF=104^{\circ}$

Work Step by Step

Since $\overline{EF}$ is a diameter, the measure of arc $EDF=180^{\circ}$. From part a we know the measure of arc $DE=76^{\circ}$. Subtracting... $180-76=104$ measure of arc $DF=104^{\circ}$
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