Answer
Diameter of the circle: 18 mm
Work Step by Step
Diameter of a Circle: $d$ = 2$r$
Therefore:
$d$ = 2(9 mm)
$d$ = 18 mm
Basic College Mathematics (9th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0321825535
ISBN 13:
978-0-32182-553-7
Chapter 8 - Geometry - 8.6 Circles - 8.6 Exercises - Page 575: 3
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