Geometry: Common Core (15th Edition)

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

Chapter 1 - Tools of Geometry - 1-7 Midpoint and Distance in the Coordinate Plane - Practice and Problem-Solving Exercises - Page 56: 68



Work Step by Step

The small square at the vertex of $\angle PQS$ indicates it is a right angle, which measures 90 degrees. Use the Angle Addition Postulate: $m\angle PQS+m\angle PQR=m\angle RQS$ $90+60=m\angle RQS$ $150=m\angle RQS$
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