Answer
$1440^\circ$
Work Step by Step
We know that the sum of the measures of the angles of an $n$-sided polygon is: $(n-2)180^\circ$. Hence here the sum is :$(10-2)180^\circ=8\cdot180^\circ=1440^\circ$
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 10 - Geometry - Chapter 10 Test - Page 684: 7
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