Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole
ISBN 10: 1439047901
ISBN 13: 978-1-43904-790-3

Chapter 1 - Section 1.6 - Relationships: Perpendicular Lines - Exercises - Page 52: 20b

Answer

U denotes a $union$ of two or more sets.

Work Step by Step

A $U$, where $a$ and $b$ are sets (a collection of items), is every item included in set $a$ or set $b$ with no repetition. You can call this the "$union$" of $a$ and $b$. Generally, U denotes union.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.