Answer
We can obtain the correct answer using the Pythagorean theorem, but the book wants us to use a ruler to find the answer. Doing this, we find that the plane is going about 255 miles per hour.
Elementary Geometry for College Students (7th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Cengage
ISBN 10:
978-1-337-61408-5
ISBN 13:
978-1-33761-408-5
Chapter 4 - Section 4.1 - Properties of a Parallelogram - Exercises - Page 190: 39
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