Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10: 0134467795
ISBN 13: 978-0-13446-779-5

Chapter 8 - Geometry - 8.1 Basic Geometric Terms - 8.1 Exercises - Page 537: 15


$\angle$APS or $\angle$SPA . The vertex is P.

Work Step by Step

A vertex is the point shared by multiple rays. In this case P is shared by PA, PB, PS, and PT. When naming a vertex the shared point should always be in the middle of the angle name.
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