Answer
$$ m \angle ABC= x+y$$
Work Step by Step
Since angle ABC is the sum of angle 1 and angle 2, it follows that the measure of angle ABC in terms of x and y is:
$$ m \angle ABC = x+y$$
Elementary Geometry for College Students (7th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Cengage
ISBN 10:
978-1-337-61408-5
ISBN 13:
978-1-33761-408-5
Chapter P - Preliminary Concepts - P.3 - Informal Geometry and Measurement - Exercises P.3 - Page 24: 44
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