Answer
P=19.9
Work Step by Step
AR=BR=BT=7.6
RT=AT-AR
RT=12.3-7.6
RT=4.7
P=BR+BT+RT
P=7.6+7.6+4.7
P=19.9
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 3 - Section 3.3 - Isosceles Triangles - Exercises - Page 147: 40c
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