Trigonometry (10th Edition)

Published by Pearson
ISBN 10: 0321671775
ISBN 13: 978-0-32167-177-6

Chapter 1 - Test: 12

Answer

10.7ft

Work Step by Step

1. This works because the pole-shadow system creates similar triangles. You need to assume that both poles form 90 degree angle with the ground, and the Sun will create shadows with the same angle. AA (angle angle) is enough to prove similar triangles. $\frac{30ft}{8ft}=\frac{40ft}{x}$ then $x=\frac{40\times 8}{30}=10.7ft$
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.