Elementary Geometry for College Students (6th Edition)

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

Chapter 1 - Review Exercises - Page 63: 31


It is an acute angle with a measure less than 50$^{\circ}$.

Work Step by Step

If the sum of angles 1 and 2 is more than 130$^{\circ}$ and the sum of all 3 angles is 180$^{\circ}$, then angle 3 must have a measure less than 50$^{\circ}$. Any angle less than 90$^{\circ}$ is acute so angle 3 is also an acute angle.
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