Answer
4
Work Step by Step
n=$\frac{360}{m\angle C}$
n=$\frac{360}{90}$
n=4
Elementary Geometry for College Students (6th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
9781285195698
ISBN 13:
978-1-28519-569-8
Chapter 7 - Section 7.3 - More about Regular Polygons - Exercises - Page 332: 19a
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