Answer
Angle ABC is a right angle.
Work Step by Step
We are told that if an angle has a 90 degree measure, then it is a right angle. We know that angle ABC has a 90 degree measure. Thus, from this, it must follow that angle ABC is a right angle.
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 - Chapter P Review Exercises - Page 29: 23
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