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: 133


$A=\frac{\sqrt 3}{4} x^2$

Work Step by Step

Since the area $A$ of an equilateral triangle is $\frac{\sqrt 3}{4}$ times the square of the length $x$ of one side, then we have $$ A=\frac{\sqrt 3}{4} x^2 .$$
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