Answer
.62
Work Step by Step
We use the law of sines:
$\frac{Sin(36)}{BC} = \frac{Sin(72)}{1} \\ BC = .62$
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 5 - Section 5.6 - Segments Divided Proportionally - Exercises - Page 268: 37
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