Answer
r$\approx$3.46 cm
Work Step by Step
l=2r
(2r)$^2$=6$^2$+r$^2$
4r$^2$=36+r$^2$
3r$^2$=36
r$^2$=12
r$\approx$3.46
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 9 - Review Exercises - Page 431: 10
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