Answer
$\triangle$ABC is an isosceles triangle.
Work Step by Step
AB+BC+CA=40
10+x+6+2x-3=40
3x+13=40
3x=27
x=9
BC=x+6
BC=9+6
BC=15
CA=2x-3
CA=2(9)-3
CA=18-3
CA=15
BC=CA
Elementary Geometry for College Students (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
1439047901
ISBN 13:
978-1-43904-790-3
Chapter 3 - Review Exercises - Page 173: 24
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