In Exercise 17 to 20, first prove that triangles are congruent then use CPCTC.
Given: 


Prove: 

To prove:
The given statement.
Given:
The following figure shows the given diagram.
Given that,
Approach:
By definition of ASA, if two angles and their included side of one triangle is congruent to two angles and their included side of second triangle, then triangle will be congruent.
The completed proof is shown in the following table.
PROOF  
Statements  Reasons 
Finite Mathematics and Applied Calculus (MindTap Course List)
Probability and Statistics for Engineering and the Sciences
Calculus: An Applied Approach (MindTap Course List)
Finite Mathematics
Calculus (MindTap Course List)
Essentials of Statistics for The Behavioral Sciences (MindTap Course List)
Single Variable Calculus
Single Variable Calculus: Early Transcendentals, Volume I
Calculus: Early Transcendental Functions
Applied Calculus for the Managerial, Life, and Social Sciences: A Brief Approach
Mathematical Applications for the Management, Life, and Social Sciences
Multivariable Calculus
Understanding Basic Statistics
Applied Calculus
Mathematical Excursions (MindTap Course List)
Elementary Technical Mathematics
Essentials Of Statistics
Intermediate Algebra
Calculus: Early Transcendentals
Precalculus: Mathematics for Calculus (Standalone Book)
Statistics for The Behavioral Sciences (MindTap Course List)
Calculus of a Single Variable
Elements Of Modern Algebra
Single Variable Calculus: Early Transcendentals
Trigonometry (MindTap Course List)
Contemporary Mathematics for Business & Consumers
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
Introduction To Statistics And Data Analysis
Research Methods for the Behavioral Sciences (MindTap Course List)
Statistics for Business & Economics, Revised (MindTap Course List)
STATISTICS F/BUSINESS+ECONOMICSTEXT
Mathematics For Machine Technology
Multivariable Calculus
Calculus (MindTap Course List)
Research Methods for the Behavioral Sciences (MindTap Course List)
Mathematics: A Practical Odyssey
College Algebra (MindTap Course List)