Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Chapter 7 - Similarity - 7-1 Ratios and Proportions - Practice and Problem-Solving Exercises: 16



Work Step by Step

Angles of a triangle add up to 180 degrees. Therefore, based on the extended proportion 4:3:2, we can set up an equation to solve. 4x+3x+2x=180 degrees 9x=180 x=20 Substitute 20 in for x to get the angles 80 60 40 The largest angle is 80 degrees.
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