Given: 

Find: 

To find:
The value of
Given:
And,
Figure (1)
Approach:
The measure of an exterior of a triangle is equal to the sum of the measures of two nonadjacent interior angles.
Calculation:
Equate the exterior angle of triangle to the sum of the measures of two nonadjacent interior angles.
Substitute
Applied Calculus for the Managerial, Life, and Social Sciences: A Brief Approach
Finite Mathematics and Applied Calculus (MindTap Course List)
Multivariable Calculus
Finite Mathematics
Calculus: An Applied Approach (MindTap Course List)
Mathematical Applications for the Management, Life, and Social Sciences
Probability and Statistics for Engineering and the Sciences
Precalculus: Mathematics for Calculus (Standalone Book)
Understanding Basic Statistics
Applied Calculus
Single Variable Calculus: Early Transcendentals, Volume I
Intermediate Algebra
Elementary Technical Mathematics
Calculus (MindTap Course List)
Calculus: Early Transcendental Functions
Single Variable Calculus
Calculus: Early Transcendentals
Mathematical Excursions (MindTap Course List)
Statistics for The Behavioral Sciences (MindTap Course List)
Essentials Of Statistics
Essentials of Statistics for The Behavioral Sciences (MindTap Course List)
Elements Of Modern Algebra
Contemporary Mathematics for Business & Consumers
Trigonometry (MindTap Course List)
Single Variable Calculus: Early Transcendentals
Calculus of a Single Variable
Calculus: Early Transcendental Functions (MindTap Course List)
Study Guide for Stewart's Multivariable Calculus, 8th
Study Guide for Stewart's Single Variable Calculus: Early Transcendentals, 8th
Finite Mathematics for the Managerial, Life, and Social Sciences
Calculus (MindTap Course List)
Introduction To Statistics And Data Analysis
Research Methods for the Behavioral Sciences (MindTap Course List)
Research Methods for the Behavioral Sciences (MindTap Course List)
Multivariable Calculus
College Algebra (MindTap Course List)
STATISTICS F/BUSINESS+ECONOMICSTEXT
Mathematics For Machine Technology
Statistics for Business & Economics, Revised (MindTap Course List)