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.2 Geometry Essentials - A.2 Assess Your Understanding - Page A19: 5



Work Step by Step

In a right triangle, the square of the length of the longest side equals the sum of the squares of the lengths of the other two sides. This is true by the Pythagorean theorem. In equation form, we can state this as: For a right triangle with legs a, b and the hypotenuse c, the Pythagorean theorem states: $$c^2=a^2+b^2.$$
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