## Basic College Mathematics (9th Edition)

Published by Pearson

# Chapter 8 - Geometry - 8.1 Basic Geometric Terms - 8.1 Exercises: 15

#### Answer

$\angle$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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