Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 2 - Solving Equations - 2-8 Proportions and Similar Figures - Practice and Problem-Solving Exercises - Page 134: 12

Answer

The length of the bridge will be 48 yards.

Work Step by Step

The two triangles are similar triangles. This means that all of the sides are proportional. We will call x the side that we want to find (the length of the bridge). Thus, we set up the equation: $x/20=120/50$. We multiply both sides of the equation by 20 to obtain that x=48.
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