Answer
1440$^{\circ}$
Work Step by Step
S=(10-2)$\times$180
S=(8)$\times$180
S=1440$^{\circ}$
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 2 - Section 2.5 - Convex Polygons - Exercises - Page 114: 7b
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