#### Answer

57 degrees

#### Work Step by Step

We know that angle ABC is equal to the sum of angle ABD and angle DBC. Thus, we find:
$$\angle ABC = 31^{\circ}+26^{\circ} \\ \angle ABC = 57 ^{\circ}$$

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Published by
Cengage

ISBN 10:
978-1-337-61408-5

ISBN 13:
978-1-33761-408-5

57 degrees

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