Answer
12
Work Step by Step
We use Euler's formula:
F+V=E+2
8+6=E+2
14=E+2
12=E
Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Chapter 11 - Surface Area and Volume - 11-1 Space Figures and Cross Sections - Practice and Problem-Solving Exercises - Page 692: 10
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