Given: 

Find: 

The value of
Procedure used:
If two sides of the triangle are equal then the corresponding angles are also equal in the triangle.
The sum of interior angles of the triangle is
Given:
The triangle
Figure
From figure
Calculation:
Consider the triangle
From the given data,
The side
Since, the two sides of the triangle are equal then the corresponding angles are also equal in the triangle. Then,
Since, the angle
Write the equation to calculate the sum of the triangle.
Substitute
Single Variable Calculus: Early Transcendentals, Volume I
Mathematical Excursions (MindTap Course List)
Intermediate Algebra
Elementary Technical Mathematics
Finite Mathematics
Single Variable Calculus
Calculus: An Applied Approach (MindTap Course List)
Precalculus: Mathematics for Calculus (Standalone Book)
Calculus: Early Transcendental Functions
Multivariable Calculus
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Mathematical Applications for the Management, Life, and Social Sciences
Statistics for The Behavioral Sciences (MindTap Course List)
Finite Mathematics and Applied Calculus (MindTap Course List)
Probability and Statistics for Engineering and the Sciences
Essentials Of Statistics
Applied Calculus for the Managerial, Life, and Social Sciences: A Brief Approach
Calculus (MindTap Course List)
Calculus: Early Transcendentals
Understanding Basic Statistics
Contemporary Mathematics for Business & Consumers
Elements Of Modern Algebra
Single Variable Calculus: Early Transcendentals
Trigonometry (MindTap Course List)
Calculus of a Single Variable
Study Guide for Stewart's Multivariable Calculus, 8th
Finite Mathematics for the Managerial, Life, and Social Sciences
Study Guide for Stewart's Single Variable Calculus: Early Transcendentals, 8th
Calculus: Early Transcendental Functions (MindTap Course List)
College Algebra (MindTap Course List)
Research Methods for the Behavioral Sciences (MindTap Course List)
Multivariable Calculus
STATISTICS F/BUSINESS+ECONOMICSTEXT
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Research Methods for the Behavioral Sciences (MindTap Course List)
Statistics for Business & Economics, Revised (MindTap Course List)
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