Concept explainers
To find:the value of x and y
Answer to Problem 29WE
The value of x is
Explanation of Solution
Given information:The diagram below
Concept Involved:
Exterior Angle Theorem states that the exterior angle of a
Triangle Sum Theorem states that Sum of interior angles of triangle adds up to 180 degrees
Calculation: Set up an equation based on the exterior angle theorem
Subtract 90 and 2y on both sides to solve the equation for x
Simplify and label it as 1st equation
➧1st equation
Use the Triangle Sum theorem which states that sum of interior angle of triangle add up to give 180 degrees.
Group like terms in left side of the equation
Combine like terms in left side of the equation
Subtract 90 on both sides
Combine like terms in both sides of the equation
Divide throughout by 3
Simplify fraction throughout the equation and label it as 2nd equation
Substitute 1st equation 35-2y for x in the 2nd equation
Combine like terms in left side of the equation
Subtract 35 on both sides of the equation
Combine like terms in both sides of the equation
Divide by -1 on both sides
Simplify fraction on both sides of the equation
Substitute 5 for y in 1st equation to find the x value
Conclusion:
The value of x is
Chapter 3 Solutions
McDougal Littell Jurgensen Geometry: Student Edition Geometry
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