Answer
$\angle$=60$^{\circ}$
She runs about 146 ft extra.
Work Step by Step
Side=200$\sqrt 3$
Side$\approx$346 ft
(346+200)-400=146 ft
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 5 - Section 5.5 - Special Right Triangles - Exercises - Page 248: 25
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