Answer
m$\angle$C=120$^{\circ}$
Work Step by Step
m$\angle$C=$\frac{360}{n}$
m$\angle$C=$\frac{360}{3}$
m$\angle$C=120$^{\circ}$
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: 17a
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