## Elementary Geometry for College Students (7th Edition)

Published by Cengage

# Chapter 2 - Section 2.4 - The Angles of a Triangle - Exercises - Page 105: 2

#### Answer

$∠A = 59^{\circ}$

#### Work Step by Step

we know sum of all three angles of triangle is 180∘ $m∠A+m∠B+m∠C= 180^{\circ}$ $m\angle A+39^{\circ}+82^{\circ} =180^{\circ}$ $m\angle A+121^{\circ} =180^{\circ}$ $∠A = 180^{\circ}−121^{\circ}$ $∠A = 59^{\circ}$

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.