Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Appendix A - Review - A.1 Algebra Essentials - A.1 Assess Your Understanding - Page A12: 134

Answer

$P=3x$

Work Step by Step

Since the perimeter $P$ of an equilateral triangle is $3$ times the length $x$ of one side, then we have $$ P=3x .$$
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