Elementary Geometry for College Students (6th Edition)

Published by Brooks Cole
ISBN 10: 9781285195698
ISBN 13: 978-1-28519-569-8

Chapter 5 - Section 5.2 - Similar Polygons - Exercises - Page 224: 22

Answer

40/3 or 13.3

Work Step by Step

Since ADE ~ ABC we can assume that AD=AB and DE=CB. We are also told that DB=BC. We can call BC X. Then we set up a proportion AD/DE = AB/CB. However we do not know the measure of DB or BC. We plug in 8+X for AB and X for CB. The resulting proportion is 8/5=(8+X)/X. You then solve and get 40/3 or 13.3.
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.

GradeSaver will pay $15 for your literature essays
GradeSaver will pay $25 for your college application essays
GradeSaver will pay $50 for your graduate school essays – Law, Business, or Medical
GradeSaver will pay $10 for your Community Note contributions
GradeSaver will pay $500 for your Textbook Answer contributions