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 7 - Section 7.2 - Concurrence of Lines - Exercises - Page 336: 39

Answer

58 degrees

Work Step by Step

Since all triangles have a sum of 180 degrees for their angles, angle ACB is equal to: $$ = 180-64-82 \\ = 34$$ Applying the same rule to triangle EBC, the measure of angle CEB is: $$ = 180 - \frac{82}{2} -34 \\ 180-41-34 \\ =105$$ Applying the same logic to triangle EDC, the measure of angle EDC is: $$ = 180-105-\frac{34}{2} \\ =58$$
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