# Chapter 8 - Geometry - 8.1 Basic Geometric Terms - 8.1 Exercises: 16

$\angle$BOD or $\angle$DOB. The Vertex is O.

#### Work Step by Step

Lines AB and CD share the point O. This creates the rays OA, OB, OC, and OD. A point shared by two or more rays is the vertex. When naming a vertex the point should always be in the middle of the angle name.

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